Malicious PDF — malware analysis report

Static analysis result for SHA-256 03c68dded07098dd…

MALICIOUS

PDF

76.2 KB Created: 2021-03-24 03:55:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 78d3123f2fc89affffd18f4fc3b0f238 SHA-1: df067e66f858b3581da13af47f9d3fbb78636101 SHA-256: 03c68dded07098dd9659c589d0861f89bac355a012f7ad99aa3f6dc24874bb7e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic confirm the document's purpose is to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pelibifir.ru/award?keyword=passport+renewal+nz+pdf PDF link annotation
    • https://cdn.sqhk.co/togareguko/ijE88gi/lenarawafuparopanutelele.pdfIn PDF document text
    • https://cdn.sqhk.co/lididiregi/jdBRjiY/82462093824.pdfIn PDF document text
    • https://fekodajitor.weebly.com/uploads/1/3/0/8/130874258/cdc2ae224f0a.pdfIn PDF document text
    • https://lumezoti.weebly.com/uploads/1/3/4/8/134863392/kewasigere.pdfIn PDF document text
    • https://zomijozefabeten.weebly.com/uploads/1/3/4/6/134636393/wibixudefok-nakifutikilel-pojinorun.pdfIn PDF document text
    • http://morasufas.iblogger.org/korean_alphabet_practice_worksheets.pdfIn PDF document text
    • https://cdn.sqhk.co/jinubodilev/42CEjiG/panda_pop_bubble_shooter_saga_puzzle_adventure.pdfIn PDF document text
    • https://ginadilu.weebly.com/uploads/1/3/4/7/134768391/pegozegam.pdfIn PDF document text
    • https://bopidojosonek.weebly.com/uploads/1/3/1/3/131384153/a40c3ddf82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403938/normal_60245575db840.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/9577285119.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/3370902.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485457/normal_603e804f4fce6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366984/normal_5fffd1b4908d5.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/titugome/sokisaselit.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/4028271770.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/uptet_form_2019_sarkari_result.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/91067426905.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

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_off0000ec76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC76 5176 bytes
SHA-256: d9fb5a810dbb5243207f33a31da6f7d18152212cbd7801396457903da58b420e
font_01_sfnt_off0000fe3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3C 11000 bytes
SHA-256: 0352bb063a0b10645e06a77e9ffa0133a8110c137dec437f6659b7dbc1221a9f

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