Malicious PDF — malware analysis report

Static analysis result for SHA-256 a650d1885559f249…

MALICIOUS

PDF

71.5 KB Created: 2021-03-31 17:04:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1a971952617074c1cf812760a0748921 SHA-1: 9ff497b0d9aea9a11c07419b768d2127a6d2b615 SHA-256: a650d1885559f24995f457220ddf45a9bee2235394f70457b53da9cf67b9d208
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://baarspo.ru/strik?utm_term=sears+garage+door+opener+programming+keypad PDF link annotation
    • https://gegilegaf.weebly.com/uploads/1/3/1/3/131383227/4949499.pdfIn PDF document text
    • https://nasoluludeg.weebly.com/uploads/1/3/4/4/134435301/403bc04958.pdfIn PDF document text
    • https://dolilifiwu.weebly.com/uploads/1/3/4/4/134401054/lelojidipobixof_dufajegixasuluw_vedalupi_zatexo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474746/normal_5feb86d3e5796.pdfIn PDF document text
    • http://worelimupuvefam.mywebcommunity.org/lovepajirukevimoxuxesupak.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427097/normal_5fd14a67d9230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_601b45e164376.pdfIn PDF document text
    • http://dmdmassage.com/876031168861vsal.pdfIn PDF document text
    • https://gokokunebede.weebly.com/uploads/1/3/0/8/130874183/4741709.pdfIn PDF document text
    • http://livecopyrightverification.com/60860245465v5dls.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_6055888d98065.pdfIn PDF document text
    • http://toworugesolur.getenjoyment.net/best_cfop_algorithms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381551/normal_5fcb499308a18.pdfIn PDF document text
    • http://onlyforyou.space/sokodoxudolaze0wyf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_6022e7d4c35d2.pdfIn PDF document text
    • http://getsalon.xyz/visual_identity_template_freefoim7.pdfIn PDF document text
    • https://jeratevi.weebly.com/uploads/1/3/0/7/130774970/vobekukudivuwute.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491687/normal_6042fa725d026.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dawejur.atwebpages.com/jaxiniwujoxug.pdfIn PDF document text
    • http://lusajafimaneru.myartsonline.com/gusaleravisigogimujudoru.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_off0000db64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB64 5516 bytes
SHA-256: adee42e3652efd24dd4f5f662d9384450d672ed08f143e68d1e351f43affd04e
font_01_sfnt_off0000ee1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1B 9932 bytes
SHA-256: 7062c76be0c12a235292ac2017f7996a353c12aab37e16f2749471ebdc0eb123

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