Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aa3358a1c1a5799…

MALICIOUS

PDF

94.0 KB Created: 2021-09-04 00:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: fdddceb5d88383561dba09afa806207f SHA-1: b434b7e60a5bf6d555e3838e0af6534718cc5ae1 SHA-256: 9aa3358a1c1a57998f43c577da0e860284bda8333e74d3ef43434b9745c06aa9
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 0.9977

Heuristics 6

  • 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.
  • 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://xn--nmqu14inmf.com/upload/files/7821723864.pdf In PDF document text
    • http://matstravel.ru/userfiles/file/sapazuzesitazus.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/40390360146.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982af68040e---29246509725.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/17808045543.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160948b9b5d7c6---36390465345.pdfIn PDF document text
    • http://impressivetravelvietnam.com/upload/files/gafopapuwujuturulizu.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/34145063219.pdfIn PDF document text
    • http://bangiyaparishadtoronto.ca/bpt/editor/uploadfiles/nolarofusarofesivaluke.pdfIn PDF document text
    • http://lifecare4all.com/upload/files/xaluluzazija.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/vabafefisazid.pdfIn PDF document text
    • http://www.espace-hotelier.com/ckfinder/userfiles/files/17577005023.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910b851e4c3---punakedujetuxivumikidowu.pdfIn PDF document text
    • http://esejsc.com/upload/files/kedofufadedugijotawezog.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/9933n74n5q7jt3qb5l41ehelt2/wekunabev.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/9lpq9n1ibghu0821ctt7gb11fd/sotoradomojira.pdfIn PDF document text
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/6b66a6f4069a794952f165eeecf7cda5/17137534793.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/rmjhgp3begpnjjj6fesljd07f7/nogep.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160a9b69863c26---kufukikeragege.pdfIn PDF document text
    • http://mdbim.pl/ubezpiecz/obrazy/file/zifitifow.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/22566886875.pdfIn PDF document text
    • http://kenzoum.org/home/integrity/public_html/ckfinder/userfiles/files/kedubasowedexa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+willpower+instinct+pdf+bookPDF 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

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_off0001064b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064B 19752 bytes
SHA-256: 942126781ebf7b814d4c1efd61b10bb83324ebde7e76f897f183c3e1ffcdc1a7
font_01_sfnt_off000139aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139AA 10836 bytes
SHA-256: 863ebebe841a96519c9b90c4154614438335826ea36303b5839a8920da86090b
font_02_sfnt_off00015273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15273 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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