Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7d3c7f14cd8c9c…

MALICIOUS

PDF

84.4 KB Created: 2021-03-12 16:49:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 60af22e2ef6aa6f9d558fa5553515e07 SHA-1: b7c0d59b66a27cccae7a348b76991d141c6b2de8 SHA-256: 9f7d3c7f14cd8c9cfbce1e2511c1f2084f9c7631feaa116dfc47b7deabd85470
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://bologen.ru/123?utm_term=altair+university+student+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453575/normal_5fd83cc7dd284.pdfIn PDF document text
    • http://nurigoluda.mygamesonline.org/koraw.pdfIn PDF document text
    • http://kalavar.xyz/adobe_premiere_pro_amtlib_dllqx0u0.pdfIn PDF document text
    • http://savadaqwe.space/zafelogedobogejokepojuv5mg7m.pdfIn PDF document text
    • http://tugrull.com/27420441454hgvpu.pdfIn PDF document text
    • http://prizinsta24.online/transcendental_meditation_youtube31mss.pdfIn PDF document text
    • http://budivev.scienceontheweb.net/76413112854.pdfIn PDF document text
    • http://givotovujoded.22web.org/vocabulary_workshop_level_a_answers_unit_6.pdfIn PDF document text
    • http://dorightschool.com/55601858571zphq1.pdfIn PDF document text
    • http://qiwi-wallet.online/2012_ford_econoline_oil_resetk7c1e.pdfIn PDF document text
    • http://heretythere.site/8175105525b3m2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502567/normal_601047a339de6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420745/normal_5ff30a4072032.pdfIn PDF document text
    • http://cozyplacefor.rest/49743761310iv55d.pdfIn PDF document text
    • http://bukipumil.mypressonline.com/givuninaviromidajexeti.pdfIn PDF document text
    • http://manapuzasupin.sportsontheweb.net/how_to_use_iphone_for_elderly.pdfIn PDF document text
    • http://dontbeshy.xyz/english_grammar_tenses_in_telugu_free_downloadt8get.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://dozodikud.epizy.com/tugugisewagusemimib.pdfIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/alpha_phonics_vs_all_about_reading.pdfIn PDF document text
    • http://peruroz.onlinewebshop.net/76586759138.pdfIn PDF document text
    • http://wavedada.epizy.com/xoladewekuf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9F 4916 bytes
SHA-256: 714ccbf400d8132d6079d03fc67a8956a9c5bef1b8bbde31d518afae39b34739
font_01_sfnt_off00010f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F63 10752 bytes
SHA-256: f6668aa59b1ac87494c81eef65ee489e89162bb91bdec59c2c98363498aba2c3
font_02_sfnt_off000133f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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