Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd241de93c1195d6…

MALICIOUS

PDF

110.7 KB Created: 2021-06-14 03:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2480b4032642861d51e9890916b46f92 SHA-1: c9a84dda88d4f7cbba7815af114052a09dd1865b SHA-256: bd241de93c1195d65c1f8f980bf9d9cd1922d207173a96b6345a1ccec66e0ea1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://drafthe.ru/uplcv?utm_term=the+last+wish+novel PDF link annotation
    • http://www.knickmeier.net/images/pageimg/file/75051889683.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf8d6ef670---diseg.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/244ad12f34323495ef3b302d1165c91f/wetosujusididu.pdfIn PDF document text
    • http://canigrup.com/userfiles/file/tazaxiniligogigijep.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf5c501e98---54617592249.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/wuzaramuvu.pdfIn PDF document text
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/2di8q52foifm42oea212lnf222/gidevun.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/877ee0094a0745f33dea2ec5cb13b031/30629073137.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1d3c6689942f615ff388591fb52f4474/guriwegodumo.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f60fe30dd---xivinumif.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/90f8ade03ac62fca8935ce324f8dba5c/36062198622.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/d3atlh5ml2kmdpdrte6tmc9i76/bimowibazijoxinek.pdfIn PDF document text
    • http://xn--80aab8aioy.xn--p1ai/userfiles/file/famaximatakob.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702c3c6c7bc---gukodorekakodex.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba95870afff---xenun.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/edgupmn22s4mlsjk0mvk5b2bb7/2178445016.pdfIn PDF document text
    • http://on-video.com/movies/movie_data/file/85579367280.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/18216415831.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13228 12584 bytes
SHA-256: ba75f29db61add405298704516656581a1575bdc28d697efdeb0ea1c67c16226
font_01_sfnt_off00015b33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B33 4568 bytes
SHA-256: 9db66b58f949f4cae91824ab10a7113cf491e2c3b7bbf786aa3dc40af4477d68
font_02_sfnt_off00016abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16ABB 18300 bytes
SHA-256: bf98990988edc00034717b83ea3aaf4536705066d6be03593fee8db35200920a
font_03_sfnt_off00019ef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EF5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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