Malicious PDF — malware analysis report

Static analysis result for SHA-256 8797d6db34b06664…

MALICIOUS

PDF

69.0 KB Created: 2021-02-11 08:13:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 05a6deda213bc6960135a02ce1296208 SHA-1: e64eba640d87bfd55c7c507110104d37391bba01 SHA-256: 8797d6db34b06664e84377c19809b1e972f3cb976a39c01c6df194e2724998aa
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://maypoin.ru/aws?utm_term=flowchart+template+excel PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4380380/normal_5ff9cf8662d56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462350/normal_601f2b498581e.pdfIn PDF document text
    • http://mabay.fun/valerapuzufozozurixokegopk.pdfIn PDF document text
    • http://powerhdniy.space/sokezefapanipinanapu5npe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375088/normal_6014d1ba1d9ab.pdfIn PDF document text
    • https://nopolojeg.weebly.com/uploads/1/3/5/3/135349815/8346125.pdfIn PDF document text
    • http://sacredname.ru/42077579169rw8x7.pdfIn PDF document text
    • http://italywow.pro/38900374530o4v6t.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490001/normal_5ff7b00f5152a.pdfIn PDF document text
    • http://tuwedoviwe.iblogger.org/99266280848.pdfIn PDF document text
    • http://rubka.space/experta_en_bodas_online_latino93vts.pdfIn PDF document text
    • https://xujuwoxevosu.weebly.com/uploads/1/3/4/8/134896670/jabopoxuzal.pdfIn PDF document text
    • http://alfa-quest.ru/xawujuzipituz8nhgq.pdfIn PDF document text
    • http://rukozhop-guide.com/5084830696420adq.pdfIn PDF document text
    • https://tupefumezamubew.weebly.com/uploads/1/3/0/8/130874634/jegilixisunuji-bilagogu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://raziwisubuza.rf.gd/renodojepibiri.pdfIn PDF document text
    • http://nisinukodepafix.rf.gd/74106441997.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_off0000d3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D9 5108 bytes
SHA-256: defbb93d501971009d910336b6922f3a4be30111da881cd23b3951fa6f33ef56
font_01_sfnt_off0000e526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE526 9924 bytes
SHA-256: 89384344ae0c723f41cb53268bdd355e70dd4add0ec81f21727b53e9e9ecf925

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