Malicious PDF — malware analysis report

Static analysis result for SHA-256 8979f6d62aae8417…

MALICIOUS

PDF

145.5 KB Created: 2021-07-04 08:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b4f0e609d801d19545c539e7ca738e9c SHA-1: 9812a525205daf959d9f56594676fcd42ab1d948 SHA-256: 8979f6d62aae841781af24270897d9c6b86310ee1d1e3b2c6855e39fb8c706ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malware or conduct phishing. The embedded URLs are likely used to redirect victims to malicious content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/16087b684eba44---gezenuzidobebulazemowu.pdf In PDF document text
    • http://amphorabeautyclub.com/campannas/file/finalaxujepofajekozitu.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/vuvb5lqtunr3jdkisvam73mgl6/41023919930.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/32782f1037359e471d4503b61d417874/36042898782.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4badb2f230---tiragef.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/47a7a6f17a59b895cc9d5c12411864d7/regobukonajugedede.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098b60098be0---ludelegupidegepu.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/10880517473.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/043aae793a88494dc4b67257930614a6/31583924998.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/90293040965.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0ca2a7892---71415437563.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/2e285e0659f11d8761d64838f413353e/visabazodinozamov.pdfIn PDF document text
    • http://ypperfect.com/ckfinder/userfiles/files/29804390000.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a72a85e2809---3172114767.pdfIn PDF document text
    • http://gibisch.org/files/files/31178367186.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85dd32fb7d---sojolusor.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/zosejavagunaliputuwopizep.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/81152340593.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/letotijavowoxusokupojupit.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/juvakopuruvexen.pdfIn PDF document text
    • http://koreadramatour.com/FileData/ckfinder/files/20210625_DCC20BE11BA2E401.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/34ef5ba89200b5bbe68ed25510dc0147/jiligokotokazuge.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/efjatkn3rt2g9igjr5b0n96035/91965277948.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf1f1efc1e---93889652990.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=cam+4+test+1+reading+answersPDF link annotation
    • 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_off0001d6d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D6D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001eeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EEEF 10672 bytes
SHA-256: 5ae16676eb6703fc97db2941f295803c7bbd198fa5f62ab9d200daf46a02effb
font_02_sfnt_off00020749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20749 18488 bytes
SHA-256: 93b93313870d35bde3d9aee3657abaf5c217d3fb3a5a6db1432f980bd0d94511

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