Malicious PDF — malware analysis report

Static analysis result for SHA-256 93222080b0e4fb7a…

MALICIOUS

PDF

65.4 KB Created: 2021-02-12 05:44:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: a139833d0d31e8b926e58367907045f0 SHA-1: 0931a0e8c2dd35f56f57d08580dccab83ab3b981 SHA-256: 93222080b0e4fb7a517359ef3f70f68543d6f258760a69c4ea3c3e4a920b5c98
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URIs, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=shooting+game+unblocked+77 PDF link annotation
    • http://tipografiyav.moscow/lizapedigt1b03.pdfIn PDF document text
    • http://rusherx.studio/bobcat_lt112_trencher_manualnzs6i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418575/normal_6009ae682110c.pdfIn PDF document text
    • http://biteroz.iblogger.org/beautiful_dolls_pics.pdfIn PDF document text
    • https://cdn.sqhk.co/mugukawi/jGiiBkX/gatopiwodakakaduwobeneli.pdfIn PDF document text
    • https://cdn.sqhk.co/kulizuxekume/f6iaAif/injustice_2_castellano.pdfIn PDF document text
    • https://cdn.sqhk.co/soribivevi/hijl34J/51405948500.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375896/normal_5feb07991e899.pdfIn PDF document text
    • http://povar2020.site/340801030252bs3d.pdfIn PDF document text
    • http://sokelekife.iblogger.org/xegomotakafej.pdfIn PDF document text
    • https://cdn.sqhk.co/jofutagi/0givZid/5186068159.pdfIn PDF document text
    • http://tasimidu.iblogger.org/fortnite_challenges_cheat_sheet_week_2.pdfIn PDF document text
    • http://best-store.club/noclip_2.11_geometry_dash_downloadybza0.pdfIn PDF document text
    • https://cdn.sqhk.co/daborofus/aVhhVV1/kpop_group_ranking_august_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/ijXHKZT/62246114597.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xevorerokune.epizy.com/amazing_grace_chords_in_d.pdfIn PDF document text
    • http://lonozixugixapap.epizy.com/fotolia_answer_8_letters_level_110.pdfIn PDF document text
    • http://zapofekeba.rf.gd/begidiseraropiwo.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A2 5468 bytes
SHA-256: 8ec95daaf2806b90b80fa3c5d9a860c5f7fef3fa8847976a96eba530dbe48193
font_01_sfnt_off0000d71c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD71C 9940 bytes
SHA-256: 9fdf239c2ff81cdfc58b0162cb50d3b6325377d09ee2c4fde60064ac6269a422

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