Malicious PDF — malware analysis report

Static analysis result for SHA-256 07f46b0ce07fd60d…

MALICIOUS

PDF

184.5 KB Created: 2021-04-14 05:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 74be6094d5b6d14160becd7888a3bf1c SHA-1: db2005fc2d83a98341c72289f9b2250b019a2cdf SHA-256: 07f46b0ce07fd60d4f399330fc58fccecfe2860b0bda0429bbdce3a855491b1f
134 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. It uses an urgency-based lure. 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 0.9997

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/strik?utm_term=muse+unintended+fingerstyle+tab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467287/normal_605c3b61ceb3c.pdfIn PDF document text
    • https://liwuvena.weebly.com/uploads/1/3/1/3/131398027/1dc1e18.pdfIn PDF document text
    • https://remepapud.weebly.com/uploads/1/3/4/7/134767963/e50d38d394.pdfIn PDF document text
    • https://kepemumud.weebly.com/uploads/1/3/1/4/131454984/tugaboborakewakibuk.pdfIn PDF document text
    • https://paniselodo.weebly.com/uploads/1/3/5/9/135969975/tinusomovepigosa.pdfIn PDF document text
    • http://lazuvozesodot.iblogger.org/autoestima_para_nios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447267/normal_6055b53150144.pdfIn PDF document text
    • http://mavosidofawuge.22web.org/cybersecurity_for_dummies_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461773/normal_5fde44fe8bdd4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lunojol/noromoj.pdfIn PDF document text
    • https://02ee9779-94d6-4ec7-959f-c0f99fe19a35.filesusr.com/ugd/cdc607_8a419837fb2c43f6817994022504cf26.pdf?index=trueIn PDF document text
    • https://cccd2283-d272-450a-840b-6541230ebad2.filesusr.com/ugd/5de1df_a92e33eae14545218205878045c169b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tumasun/98507566319.pdfIn PDF document text
    • http://bajobakokela.epizy.com/sabejiniro.pdfIn PDF document text
    • http://bofagobun.rf.gd/reaktionsgleichungen_aufstellen_bungen_mit_lsungen.pdfIn PDF document text
    • https://f98f40d2-b649-4e6b-99af-b89bbf2331ff.filesusr.com/ugd/724bd4_6ac56c506d9643d19f3733f0be17572e.pdf?index=trueIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_907b89699eca4e39b79929d25a38efad.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aa4ca68-4912-4803-9ab9-b5fc25ab0ae5/telonazutugikogabusovonas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec93d79e-3b9d-4bc3-81e1-46136383138b/49063946010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3004a9bb-9582-44ab-a7a2-36498131bf77/memory_trace_definition_psychology.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_off00029b8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29B8A 5320 bytes
SHA-256: ea3bdd84636e3d9461702365ef7d735061ef1a702eebc20de093df01c80b57b6
font_01_sfnt_off0002adc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ADC7 11676 bytes
SHA-256: 7e500c7a671961ff18aba969850473ceed85d794ca452695b3f6e8fc96eb14ac

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