Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d5a9940a6a8364…

MALICIOUS

PDF

80.6 KB Created: 2021-05-31 05:43:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b9b1ebf7fdf77763c6ace192584e35bc SHA-1: 4bd6474ca8b12e19a0d58f2197907531a8b12196 SHA-256: 93d5a9940a6a83646dc431df3ae29296eb0948e7f521ea03731db0b638910327
186 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 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 6

  • 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 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/123?utm_term=mediaset+play+app+android+tv+apk PDF link annotation
    • https://gobodanugamo.weebly.com/uploads/1/3/4/8/134862857/nowuf.pdfIn PDF document text
    • https://vipagazowarofi.weebly.com/uploads/1/3/4/6/134685611/4155237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414701/normal_603816b5148c2.pdfIn PDF document text
    • https://paxuxavige.weebly.com/uploads/1/3/4/3/134373921/449290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386363/normal_6066d399c56d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530937/normal_60027cf6426c8.pdfIn PDF document text
    • https://puzagetidorijes.weebly.com/uploads/1/3/4/4/134495880/5a826e3c2bfe.pdfIn PDF document text
    • https://jadamoxor.weebly.com/uploads/1/3/5/3/135344742/xoxewer_xefosebi_xodiga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420250/normal_60463619106dd.pdfIn PDF document text
    • https://zekawumili.weebly.com/uploads/1/3/4/4/134403966/lubozezafax-watelajibi-xinajukokasidig-sagad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_5fd1a1bbae75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480155/normal_603173d1246c1.pdfIn PDF document text
    • https://bijefalatobin.weebly.com/uploads/1/3/4/6/134629646/3036444.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fd600d89e752.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424630/normal_5fcf0bb26ab02.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/52d1c82a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462339/normal_5ffefe4620e24.pdfIn PDF document text
    • https://wupugosow.weebly.com/uploads/1/3/1/3/131382590/8257388.pdfIn PDF document text
    • https://tavugalijob.weebly.com/uploads/1/3/1/1/131164394/wojit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF14D 5184 bytes
SHA-256: 51b4b2b27a8ce46507eeb4bfbdad4469bbbe106af38ca2213efcfd7af1cc5f04
font_01_sfnt_off00010312.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10312 21004 bytes
SHA-256: 4f16b69f0af665fd8e2fd5f44199bd631d3e62906bd4f808a94fdd35b9a266d1

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