Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8de486bb47f61c6…

MALICIOUS

PDF

117.3 KB Created: 2021-07-08 03:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 042f1a3973e25753e00052cd5c4aa038 SHA-1: a56ce18dedc094bad33c37f41dba34b803919eda SHA-256: d8de486bb47f61c628246a67beb976b90698d47357dd581f4d88ff5f39fb50e2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is classified as malicious and exhibits characteristics of an advance-fee scam. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://inwebjor.ru/uplcv?utm_term=refining+sound+a+practical+guide+to+synthesis+and+synthesizers+pdf PDF link annotation
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/7a157b9a8e440cd8a65a25ea8acc23e5/64534559066.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/79ae267a112097e19776919718149290/81693662879.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/0e437f61f6b5f3377de9d3b83bd847ce/wafafesakipirunixulevu.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/9074834489.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1f21e94d2b0a85eb250802c47135c6ff/2012590239.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd510301e66---wiruzaroravik.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce3444108a---nakutimimibevoxuvekuram.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/eaac17b5de88b296fcc51a18c84eb1ed/99979805692.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160dc1b83956f2---24220391046.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/2a8bade6797cbba2ef470c1d7a7c3a95/sovomeluxefoxefudokaj.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0434bd705---65204608628.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5305c2093---mimuzezemokek.pdfIn PDF document text
    • https://momsgardenfoods.com/ckfinder/userfiles/files/96834444579.pdfIn PDF document text
    • https://proxus.nl/file/55973715231.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607e416537875---jufolodefoxegimiki.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b739ce092c6---bedirad.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/5b71f63826de3520f8a7c7dc0b997ec7/nexapapenibok.pdfIn PDF document text
    • http://farashimirooz.com/files/11562929544.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/04b67c6721f4433cb6112fd1e69522c1/zedof.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/39106234294.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/ae5952c09057dcb877de0592bc49860b/lutedabujinosu.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/27528e0ded36d77cdd405c170145a094/tosixojimelozuroparotom.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca85153ad7a---38823393375.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8af57c8e25---65923363254.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/hs17og815hvp3rnnsffnpn4v1g/69628483217.pdfIn PDF document text
    • http://kamennykoberec.eu/editor_uploads/system/files/bipozezorukorexelesaded.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000164a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CBA 11216 bytes
SHA-256: ae1a913fae47559f31c2124e3dc683c636279615cd6f21867aec12302b622fdb
font_02_sfnt_off000196d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x196D2 18512 bytes
SHA-256: bf7e92e0696fce1a9e092f158e6eeea6d662ea8b6f9d3b9e5394fbcc78c688b0

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