Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d2f134975471e97…

MALICIOUS

PDF

82.7 KB Created: 2021-06-10 03:25:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 846b0b993a54adce2b6b068533f3118d SHA-1: 2ff48d21681e723f2e49d1436cf8a8e137327687 SHA-256: 2d2f134975471e977f89d526936945340633c0a7e6efba0f29e6bb6b2ad4a457
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 0.9997

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 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://irlanc.ru/pbw?utm_term=firefight+brandon+sanderson+epub PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4371267/normal_5fee6b3ec3fdf.pdfIn PDF document text
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/7904685.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_60460ddc76e1d.pdfIn PDF document text
    • https://juzofejojakowam.weebly.com/uploads/1/3/4/1/134131318/fenesuwoxukadi-zavuve-mowijezake-gotaguzepizurog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492294/normal_60016b04c8090.pdfIn PDF document text
    • https://xukoperupe.weebly.com/uploads/1/3/4/7/134743664/rutokavalegijinixef.pdfIn PDF document text
    • https://setasavapu.weebly.com/uploads/1/3/2/6/132683041/3317f2.pdfIn PDF document text
    • https://reninifovebomul.weebly.com/uploads/1/3/4/3/134361606/feworamibigil-zenole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470962/normal_606c649cc266d.pdfIn PDF document text
    • https://rezizeme.weebly.com/uploads/1/3/0/7/130775554/ad3736.pdfIn PDF document text
    • https://rokipidofavum.weebly.com/uploads/1/3/4/0/134042790/jagukusa_muxokod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471946/normal_60016a0422ba2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bac0986-8d5c-4b9e-b5fb-fb1cf3d471f2/pisitoxitoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc8b327a-a1a6-40a3-ab3d-0da55fd74caa/59630891605.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6100b83f-52e1-4c84-86c0-990a4ba70070/89840891836.pdfIn PDF document text
    • http://nukuxim.pbworks.com/f/datotedizisiwaputigip.pdfIn PDF document text
    • http://jabodawo.pbworks.com/w/file/fetch/144844518/gravity_falls_journal_3_download_free.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/f/44132452007.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/neradozujipuxex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c9a9b6-411c-43c2-85f1-bbef376a28a9/zegebejegujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/746491c3-b790-4b21-9c9b-9106f6e8e30f/66207693827.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_off00010318.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10318 5364 bytes
SHA-256: 24f74f2be0b011b28f47037b505df797e1d597ec2d3aefca3cf8e372472255be
font_01_sfnt_off0001154a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154A 11772 bytes
SHA-256: 5665f3b4108f124610814d6615945cae2ac0d28fddadc01100c11cec80191cb3

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