Malicious PDF — malware analysis report

Static analysis result for SHA-256 3129290606a9bec6…

MALICIOUS

PDF

82.0 KB Created: 2021-09-11 09:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 531df4a0195becaf3baed9daac172016 SHA-1: 54b9631a6cd664eb46a5e63e11c991260a850636 SHA-256: 3129290606a9bec6a386e5e13765e9a871982654deb6f8b04873f42fe92d1230
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://drafthe.ru/uplcv?utm_term=mobile+legends+apk+free+download PDF link annotation
    • http://kxzyjy.com/CKEdit/upload/files/52979973962.pdfIn PDF document text
    • https://alkoplast.rs/files/31549852423.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/mebekuxuzowa.pdfIn PDF document text
    • http://mirsistem.com/depo/sayfaresim/file/53663290022.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/leganasapegeliwowonu.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/genunokukonizijaxep.pdfIn PDF document text
    • http://mybed.tw/uploads/files/202109060402283207.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/fowutapak.pdfIn PDF document text
    • https://sadhankendra.org/erc/media/zemobomel.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/dewiguxawomupuzepided.pdfIn PDF document text
    • https://duongthuy.net/userfiles/file/narinajaweno.pdfIn PDF document text
    • https://pima-alarms.net/slicice/file/2422920306.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/6qtkpqhe6vh01djfafbi0rv5aj/ruxemak.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/38371792847.pdfIn PDF document text
    • http://st-ark.it/userfiles/files/10017071499.pdfIn PDF document text
    • http://p-energo.ru/content/file/kimad.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161341c47e5eb7---15654818015.pdfIn PDF document text
    • http://oilmachineydy.com/d/files/vuwigakotixoli.pdfIn PDF document text
    • http://jamesandsons.ca/userfiles/file/42542074640.pdfIn PDF document text
    • http://johnlillylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24888888492.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/8622814674.pdfIn PDF document text
    • http://biznesfishki.ru/files/userfiles/files/zosukoxigerodituzusuk.pdfIn PDF document text
    • http://koreaseowon.com/ckupload/files/26087017748.pdfIn PDF document text
    • http://gonvvama.net/filespath/files/20210901091827.pdfIn PDF document text
    • http://moutierrozeille.fr/userfiles/file/zajujaranak.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C3 10888 bytes
SHA-256: 8e6667b1c6ff9d202ffae732194a619be46ae80577b5ff130f4da97b763dfe04
font_02_sfnt_off00010caa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CAA 17768 bytes
SHA-256: 735e7b166eb1bc02526e48bbc74c6f1ecd030b4f4e337847bb85f1f25d9a191b

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