Malicious PDF — malware analysis report

Static analysis result for SHA-256 92826ee2775031b2…

MALICIOUS

PDF

86.3 KB Created: 2021-05-17 14:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: be06d3b2af40fc5e3df828789b129084 SHA-1: 10192c3dd12667eb6fb8305c496954770b9dd51b SHA-256: 92826ee2775031b2ee6f2ba12a114f76ee34c3dbb8846cfc0448431be8943dde
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 0.9998

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://dugedepap.ru/strik?utm_term=go+pro+book+amazon PDF link annotation
    • https://bavanakeburosot.weebly.com/uploads/1/3/5/3/135302165/miwoza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465941/normal_60518cd501e2a.pdfIn PDF document text
    • http://aycotoro5.xyz/98955118933p0x92.pdfIn PDF document text
    • http://wordsidepost.top/817536251617d7yw.pdfIn PDF document text
    • http://erogan-columbia.site/arterial_blood_gas_analysis_copdhs4rv.pdfIn PDF document text
    • https://rofikilidoxomuk.weebly.com/uploads/1/3/4/0/134017179/6ae6350b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_6030a9935c5cf.pdfIn PDF document text
    • https://kofivenemiwelew.weebly.com/uploads/1/3/1/3/131380814/lufifekubeto-jewumafawefitez.pdfIn PDF document text
    • https://nevidabaxava.weebly.com/uploads/1/3/0/7/130775666/pesopipepododam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406166/normal_602a4ae74c4c8.pdfIn PDF document text
    • http://sayfelengs.space/leaving_time_jodi_picoult_amazonp2rh1.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/minabiwa/74970715213.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/jalutodidobapi.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/89695941546.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_off000112ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112ED 5040 bytes
SHA-256: 0117cb1f8bc40c782832649e2ac949b3538efb4298598c6605514bdebef8b1da
font_01_sfnt_off00012403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12403 11480 bytes
SHA-256: 11df7bdc623011e112643321c0bffbdd1500dd49205f2e7f36fe2be2dcd166f3

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