Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08da00f384983d3…

MALICIOUS

PDF

76.2 KB Created: 2021-04-01 00:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ed588b6a925441009fc3126573f6e8a6 SHA-1: 23719b5f7aa2da0c34121d0134fb058d40ca23e5 SHA-256: a08da00f384983d36e0b48d4641a9681505a050c5d1dd08b88c8b3b2005cbef1
126 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 by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing operation. The document body, though partially garbled, includes a search query related to reheating pizza, likely a lure to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=how+to+reheat+frozen+little+caesars+pizza PDF link annotation
    • https://zutegikovepob.weebly.com/uploads/1/3/4/0/134017150/kopofafipif.pdfIn PDF document text
    • http://dowotezovemalo.mygamesonline.org/73071048482.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370319/normal_600e082acf742.pdfIn PDF document text
    • http://wodedutipif.medianewsonline.com/wolkenstein_problems_general_physics_solutions.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/66981949bd5.pdfIn PDF document text
    • http://juvovagesubo.mywebcommunity.org/allopatric_and_sympatric_speciation.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/zigivipugovojojuba.pdfIn PDF document text
    • https://rixowumunek.weebly.com/uploads/1/3/5/3/135330445/c209ad3a.pdfIn PDF document text
    • http://ligexekena.mywebcommunity.org/adjective_clause_exercise.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478670/normal_605a6067a1a1f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_60254df20e466.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479470/normal_5fccf48214114.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369631/normal_5fdd692e7059d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463272/normal_5feebf9e9f730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488330/normal_6027fce3bec42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414352/normal_60013c6daff52.pdfIn PDF document text
    • http://gilumesu.mypressonline.com/antigeno_prostatico_funcion.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/muxozuvalubi/83122144996.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/boris_fx_sony_vegas_14.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_off0000e970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE970 5208 bytes
SHA-256: 278ed8fbd77b4c4fce37a858026dc8d14bfa0afcefc509c9c491637a7f058669
font_01_sfnt_off0000fb3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3E 11372 bytes
SHA-256: eb7595d1041873b4a6b354d9c6b18c39504880414c2c82391f35b4a7433e4a68

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