Malicious PDF — malware analysis report

Static analysis result for SHA-256 613134e5057830da…

MALICIOUS

PDF

75.1 KB Created: 2021-03-13 20:12:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: eefde0f3cfa49d45fab4dc81980db65c SHA-1: 3cc1a0d0b84ff11cf20a4ff11d916ef6887755e4 SHA-256: 613134e5057830da3115b993a5289be09ad8e4b61524249e66f1ceb853d0aa21
126 Risk Score

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://botokaw.ru/wix?keyword=literary+elements+lesson+plans+high+school PDF link annotation
    • http://xumosigebazu.iblogger.org/4856078463.pdfIn PDF document text
    • http://helpverifedbadges.com/marked_by_king_bs_answer_sheet9hkvv.pdfIn PDF document text
    • https://cdn.sqhk.co/tejosepu/jQhhWuI/14317467749.pdfIn PDF document text
    • https://cdn.sqhk.co/palevisi/bClhbia/2816610458.pdfIn PDF document text
    • http://goossyy.online/bobedajirotipagevut719cx.pdfIn PDF document text
    • http://obschee.xyz/40323582436gya39.pdfIn PDF document text
    • http://vogeposekuxav.66ghz.com/zadovanovogotumipamiw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duzatip.rf.gd/nizozobavere.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/6930426525.pdfIn PDF document text
    • http://fitimulosegi.epizy.com/iim_bangalore_pgp_full_form.pdfIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_bed9923c2009402f83065f1d7a8c1ed7.pdf?index=trueIn PDF document text
    • http://buxodanukesidup.epizy.com/how_to_use_pocket_procreate.pdfIn PDF document text
    • http://xuwugufufokiti.epizy.com/law_office_management_for_paralegals.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/fundamentals_of_corporate_finance_questions_and_answers.pdfIn PDF document text
    • http://zuxorijafofonal.rf.gd/vojasezutomopupet.pdfIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/hp_fortify_static_code_analyzer_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/dilawose.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/fibopez.pdfIn PDF document text
    • http://tipopetudigovib.epizy.com/tiwaxef.pdfIn PDF document text
    • http://kobuxotaregudes.rf.gd/descargar_utorrent_pro_apk_android.pdfIn PDF document text
    • http://birotizedu.epizy.com/bawexenifuna.pdfIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_480e65600a9743cdb9aaf963a5ac0968.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

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_off0000e948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 5392 bytes
SHA-256: 80fae5b894b27a8f518a87c11a69d274410d5ce60e6d1c3a2e42835408b1af06
font_01_sfnt_off0000fb80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB80 10492 bytes
SHA-256: 21a8ebab366c4fd40ecf34baf5f4de1ebc35f0547a6d93c6922ad309086954fa

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