Malicious PDF — malware analysis report

Static analysis result for SHA-256 6750aea2677ac4a6…

MALICIOUS

PDF

83.1 KB Created: 2021-09-15 16:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 219221592fb77ab0bce8021bef14861d SHA-1: 00196991c9cb43b02e232c32000a3f4b5329b24e SHA-256: 6750aea2677ac4a65e1045285566c225633d368a3c8622ff62b0387cbce3b0fa
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate that the PDF is part of a link farm hosted on disposable or compromised domains, designed to obscure the final malicious destination. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely serving as a lure for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://queure.ru/uplcv?utm_term=wonder+woman+1984+streaming+full+movie PDF link annotation
    • https://autopsrus.aerovents.com/ckfinder/userfiles/files/75437547351.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109080653246025.pdfIn PDF document text
    • http://jinshi66.com/uploadfiles/files/8066494311.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog/file/gewizefunegufodopefi.pdfIn PDF document text
    • http://creationart.hu/files/file/kozasukizen.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/161315a8cbc934---49305161993.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/44301816253.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613521b6272f2---28034046955.pdfIn PDF document text
    • http://sivam.pl/files/file/tobevunuwuvude.pdfIn PDF document text
    • https://nabil-doukali.com/userfiles/file/71410544843.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/5446907030.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/zadipemezevunageziwusu.pdfIn PDF document text
    • https://ciela13.leaddeehub.com/userfiles/files/56252270868.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/zututivojeva.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/62166100851.pdfIn PDF document text
    • http://www.park-seversk.ru/other/js/ckfinder/userfiles/files/kofarobikuzodezosij.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/bibusoguxepu.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/54174716280.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/061602167921.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/38913526273.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/povaxatofolevavex.pdfIn PDF document text
    • http://ambcavallon.eu/userfiles/files/51341307243.pdfIn PDF document text
    • http://style4.allwebeasy.com/userfiles/files/85874439089.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613d56094bfc7---55210272382.pdfIn PDF document text
    • http://yizhu580.com/ckfinder/userfiles/files/12199114135.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_off0000dbe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE2 18120 bytes
SHA-256: cc4a9cb1a9e96bc7e978a30d56db5679a6853dc806abca26580c1193764e0f27
font_01_sfnt_off00010b34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001234b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234B 11448 bytes
SHA-256: 630abdde65c86f2cb8e5c0d931497ae750460c79b97b603706bdd18d6f535de5

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