Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ccb813231c3d07…

MALICIOUS

PDF

72.9 KB Created: 2020-12-26 02:59:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4c78567d79612f8bd282074ea2741050 SHA-1: 2a4ffb728af6aa58371c1f355a1123cce2b110fc SHA-256: 12ccb813231c3d07d979b1172e769b3a68795437178d30e57064c7f5bcdf263b
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The primary external URL, https://trafffi.ru/strik?utm_term=dragon+head+golf+course+edmonton+ab, is likely part of a phishing or scam operation.

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://trafffi.ru/strik?utm_term=dragon+head+golf+course+edmonton+ab PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408995/normal_5fcd5e7e9110e.pdfIn PDF document text
    • https://dowikonusinewe.weebly.com/uploads/1/3/4/3/134374018/sawarenexowazaxifo.pdfIn PDF document text
    • https://cdn.sqhk.co/tirewugodus/hbWibEA/ninesogavuxila.pdfIn PDF document text
    • https://bupizezar.weebly.com/uploads/1/3/4/8/134853483/latulujabapado.pdfIn PDF document text
    • https://cdn.sqhk.co/sepufaziru/jjFijPe/vazavemotinape.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadumiza/R2S6OSd/24003453292.pdfIn PDF document text
    • https://nebowepef.weebly.com/uploads/1/3/4/4/134483035/xelejigotopiwon.pdfIn PDF document text
    • https://forajezar.weebly.com/uploads/1/3/4/1/134108615/luzavaguwet.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/eVMGBhg/linear_equations_worksheet_algebra_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371495/normal_5fca26bbb0c6e.pdfIn PDF document text
    • https://kuzogirig.weebly.com/uploads/1/3/4/7/134748708/gevekavafixasuwi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460970/normal_5fe259e3229ea.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/25049a68-54be-4503-a5ab-03f8b3225fda/insta_liker_apk_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbcbdd39-aaf4-4ac6-8390-ca65604e27f4/37913548459.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_off0000dd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 5572 bytes
SHA-256: 5f89324672b2303494dfbccf32b68ffe845e92db7950c5908e01d1e7324ae058
font_01_sfnt_off0000f028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF028 11288 bytes
SHA-256: bf19138eff50e69151a1f0667ec5c8b25db7a4c65d8596c918c7c847e75164ff

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