Malicious PDF — malware analysis report

Static analysis result for SHA-256 c30332634f7dec29…

MALICIOUS

PDF

81.1 KB Created: 2021-09-05 08:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: c53b782d2c34675046eb725f6e526e8f SHA-1: 084ab0052ba9e2e990b79ee615c7e3be838d5fb1 SHA-256: c30332634f7dec293ca85636e0d2ebb97157c88f5f247b79676399ee3fdf4bca
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using small PDFs on disposable hosting for link farming, which is a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://veterinariomauracotti.it/userfiles/files/fegil.pdf In PDF document text
    • http://neodentpetrosino.it/userfiles/files/22486679134.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/58306589486.pdfIn PDF document text
    • https://torgradio.ru/new/files/file/77942328019.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/97027554175.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/defb807d5e817c4c11d012712b9847ba/getorir.pdfIn PDF document text
    • http://cedarvalekansas.com/clients/875954/File/51682351750.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/vowise.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/69f9238d4385651cf5891d5d96986923/pavibapaloka.pdfIn PDF document text
    • https://ritascreation.com/userfiles/file/71857864411.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/jipafo.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c8972707e4097871c8141f18ddf35ade/botidu.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/suu87afsi98hqp6rsstr38qs51/kivurenebuno.pdfIn PDF document text
    • https://temahr.hr/files/6787048976.pdfIn PDF document text
    • http://zubrcup.by/files/files/kepet.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/81512241169.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/mewirigutabojediga.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/20493943420.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/90756965461.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/vasab.pdfIn PDF document text
    • https://cambodiaangkorhomestay.com/userfiles/file/87078425344.pdfIn PDF document text
    • http://www.predia.cz/userfiles/file/83332564180.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b20838744---4267973472.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/nurizozabefin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=despite+and+in+spite+of+pdfPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 10344 bytes
SHA-256: c9001547015ff5d5d21f9a4ebd44eaad170b59dad4479f113fec13f20fc1544e
font_02_sfnt_off0001082b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082B 18196 bytes
SHA-256: 03871b19402762c6dfe5f1e7086040b4e7816ffcd9a9847e516458a902487a7f

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