Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dbafa65a2e71594…

MALICIOUS

PDF

75.2 KB Created: 2021-03-23 20:20:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d174302707fb16d34117665cbec11128 SHA-1: 5b0696cbb4ca25935da1f6a29db8c6c17f3e2c45 SHA-256: 7dbafa65a2e71594325f5d352921f4ce1a13b848e085489f9b140dc726573371
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://resalured.ru/aws?utm_term=when+worlds+collide+full+movie PDF link annotation
    • http://cleaner-inn.club/zen_pinball_medieval_madness32o5a.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/9042228.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497695/normal_5ff110216acac.pdfIn PDF document text
    • http://drilltech.info/500_recetas_de_sushi_gratisffnhw.pdfIn PDF document text
    • http://idclick.cash/759299114855bu6i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365635/normal_5fc6e17aa1aff.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/7b5hgzW/12681947770.pdfIn PDF document text
    • https://jerusofiv.weebly.com/uploads/1/3/0/9/130969981/6117452.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/f95abf3c.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/bkjhY9c/fanixuvuwobileso.pdfIn PDF document text
    • http://trikotoria.ru/99327973011wg4qm.pdfIn PDF document text
    • http://xufuxenu.mypressonline.com/fonewaweparakelu.pdfIn PDF document text
    • https://sikenobavusemel.weebly.com/uploads/1/3/2/6/132682861/261057.pdfIn PDF document text
    • https://metiwefipit.weebly.com/uploads/1/3/1/4/131406934/datul_tefokedirek_jefuzezelasof.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/noun_adjective_adverb_verb_list.pdfIn PDF document text
    • http://discout.online/wajadaforajavcj8rd.pdfIn PDF document text
    • https://cdn.sqhk.co/bumajanivosi/tZOjihg/spelling_and_grammar_test.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tobidogajetu.onlinewebshop.net/38339311186.pdfIn PDF document text
    • https://441768bb-9839-4df4-8f78-dd1233b527f6.filesusr.com/ugd/7e6080_ab0ec774f2684b8b904c6dcd869e0cf1.pdf?index=trueIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/comptia_network_n10-007_exam_questions_and_answers_2020.pdfIn PDF document text
    • https://31e64076-56b3-4e53-9780-179364fbad2f.filesusr.com/ugd/d8d3cb_f84971408a0c4ef88d88f276316c60cf.pdf?index=trueIn PDF document text
    • http://riveminigokoxa.myartsonline.com/bookkeeping_and_accounting_for_dummies_free.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_off0000e8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B5 5216 bytes
SHA-256: 5c1419a9e9a355b523cd0dd4155673c29eeb4e8cc69c3700931c8e2b959fe3d9
font_01_sfnt_off0000fa66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA66 11048 bytes
SHA-256: 90c2757f64b16ec07f1be1aeee982c732f32d50537143bfe4d73c410757bd4b2

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