Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaccc4cafe490810…

MALICIOUS

PDF

68.7 KB Created: 2021-03-10 00:37:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e9409fda5de91a257c417b8758bf59ec SHA-1: 3110cc514b92249d6fa72f421748b05a3722ce3f SHA-256: eaccc4cafe490810607e20b614e44f7dcb886a230d2ea7b4422faaf7fbbcd453
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://seumenha.ru/award?keyword=blitzkrieg+bop+guitar+tab+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482636/normal_602d7f26b3e93.pdfIn PDF document text
    • http://sanenoxedan.iblogger.org/ikea_catalogue_2020_free_download.pdfIn PDF document text
    • http://narelarijejale.iblogger.org/dixuterukenar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406785/normal_60011832b8a54.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/bemurefukojeveta.pdfIn PDF document text
    • https://worojipe.weebly.com/uploads/1/3/1/3/131382243/7cf512472.pdfIn PDF document text
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/1286167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444371/normal_6036c2474d6a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366347/normal_5ff24bd4ee8a6.pdfIn PDF document text
    • https://retizobokeli.weebly.com/uploads/1/3/1/0/131070240/vajavereval-bibagogemen-pupiloxedibi-wozimumob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3cd6846c-369c-4875-9c63-132df726a2dd.filesusr.com/ugd/7ab50f_909f62612ad7449197ef53676bfaaeda.pdf?index=trueIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_6d7d254c547e468bb7c7e1689749d9f5.pdf?index=trueIn PDF document text
    • http://lawigut.rf.gd/best_english_grammar_book_for_competitive_exam_in_india.pdfIn PDF document text
    • https://a97be2a3-bfb5-42de-bba9-b145341b31aa.filesusr.com/ugd/1f2860_7017901a8229428885f71ae99bca3da5.pdf?index=trueIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_41dc280294514e828a02667e1a1c4fe5.pdf?index=trueIn PDF document text
    • http://nofufofivazogi.epizy.com/percy_jackson_and_the_titans_curse_watch_online.pdfIn PDF document text
    • https://790985df-dfec-4a08-b509-00f37668cf87.filesusr.com/ugd/a421e3_4e97dba5257448dea006fe4143ccfd86.pdf?index=trueIn PDF document text
    • https://1628ddcf-e301-416d-9649-d9339b85441b.filesusr.com/ugd/0b1079_d0a88c24266c41659c0f82ab84b16940.pdf?index=trueIn PDF document text
    • https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_309702b6dd1d4dc9bc9f0398954515ff.pdf?index=trueIn 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_off0000d054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD054 5336 bytes
SHA-256: 3145cf09231d7d579ec6af53fa7e95e4e7e184df9784ae8bd8a9cae1084868db
font_01_sfnt_off0000e290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE290 10276 bytes
SHA-256: 76f428d233f2fb68f5d222ff7db0c7d1cbfd0681380d66fd65c2c8a8d51b12ee

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