Malicious PDF — malware analysis report

Static analysis result for SHA-256 008eacdf546f5675…

MALICIOUS

PDF

81.5 KB Created: 2021-09-05 00:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f412a2fac3a8e8241c030a003cd7d742 SHA-1: 1ceb6195a4d221df78a6c485c679694ba5a70bf8 SHA-256: 008eacdf546f5675c59d28ec8d4cb0154e83bac700574fcfc782f212d835d46a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many pointing to compromised websites. The heuristics indicate it functions as a link farm, likely directing users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=maths+worksheetfun+subtraction PDF link annotation
    • https://askisan.com/upload/ckfinder/files/mijutekuladuvamosilive.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a4499abe073---zopawatutemusemifabasa.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d6d2231162d---94693783495.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/53662763567.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/mci438tn4lghac2tnjqo1uapon/vibokelozajokulelo.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d76baf5d4---nuvifakojedaxobefo.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210717_132358.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/242003254860.pdfIn PDF document text
    • http://jaht.com/userfiles/file/12568900766.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/bc3982ba5cd725036e5f95bdb250a86f/zususepewapesivaxi.pdfIn PDF document text
    • http://euhoca.com/js/ckfinder/userfiles/files/monowepojilago.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2c8e120c9---10385371377.pdfIn PDF document text
    • https://instalacje-elektryczne.net/ckfinder/userfiles/files/xefodotorejikaxojadoputu.pdfIn PDF document text
    • http://ubest.ru/images/file/86455213316.pdfIn PDF document text
    • http://acpiindia.com/userfiles/file/64845901236.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/neliwubutujoxizemoji.pdfIn PDF document text
    • http://iteequipment.com/clients/65150/File/42606216331.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/160e490d4e2b84---58100003294.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/70781213007.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/kowumuboligizotedo.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/88162892023.pdfIn PDF document text
    • http://taiwanglassgroup.cn/userfiles/file/gudowolokugakesigorefa.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0407659395---xedenuruguzeb.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/1332017472.pdfIn PDF document text
    • http://remaining-mc.de/userfiles/file/verilipulopeperazegara.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_off0000d961.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD961 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF178 10800 bytes
SHA-256: 803224a9800d32df60fc410f35ac3fcc8f11f33c825e72012137b7920b55d98e
font_02_sfnt_off00010a69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A69 17576 bytes
SHA-256: b7a9120e2d9b521214948485152f43f147343b12a07ec239ae4e2112eeb592d1

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