Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc9706076de6f808…

MALICIOUS

PDF

85.5 KB Created: 2021-04-07 07:40:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 933b43f2d83f69b12a4d57a4bdecf760 SHA-1: ef5624fa2742e59dbeef523ade64525e289ee51f SHA-256: cc9706076de6f8085f60ecff33de47f9368bdb778369c9e7ad74c3e25e678df6
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://soxebez.ru/123?utm_term=grim+dawn+battlemage+build+guide PDF link annotation
    • https://giwakatunu.weebly.com/uploads/1/3/1/4/131437107/sinafebunotuwatoxeti.pdfIn PDF document text
    • https://cdn.sqhk.co/xamitarerivu/RgcejfV/kaxavewewufos.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/2giyojf/ultimate_3d_classics_car_rally_mod_apk_rexdl.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/Yjfnhhc/precious_metal_prices_today_uk.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/949d7085.pdfIn PDF document text
    • https://cdn.sqhk.co/noloxunipe/UJ0LibR/gigulakidukaxiv.pdfIn PDF document text
    • https://cdn.sqhk.co/wolitobutak/gjGlXYC/72147295886.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_5ffb0efd6dd9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_603fb88a89545.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391898/normal_603f8478917dd.pdfIn PDF document text
    • https://cdn.sqhk.co/putuziboki/efLjaha/toxakopabapugajajonim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470028/normal_601582ab4bb4e.pdfIn PDF document text
    • https://liwobolavus.weebly.com/uploads/1/3/4/1/134131542/fufematuvudi.pdfIn PDF document text
    • https://cdn.sqhk.co/rizikodeni/Yhjigif/gulabi_aankhen_song_old.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/hwjeoWJ/mopabekupawinak.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tugurodegid.rf.gd/graphic_designer_resume_template_indesign.pdfIn PDF document text
    • http://joberemig.atwebpages.com/bukittinggi_dalam_angka_2020.pdfIn PDF document text
    • http://nununad.myartsonline.com/burger_king_large_fries_nutrition_facts.pdfIn PDF document text
    • http://girewejixax.rf.gd/arquitectura_neoclasica_en_inglaterra.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111D1 5232 bytes
SHA-256: 37b7fac3468760c8e5333fa63760c59de5d78c07f1989bf29acfb14b8455bebd
font_01_sfnt_off00012391.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12391 10848 bytes
SHA-256: cb781ebcb2837fe76d1bbaa77c667b337d8cfaf9dc2f052c4423a46956716e81

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