Malicious PDF — malware analysis report

Static analysis result for SHA-256 714564074c0c3754…

MALICIOUS

PDF

97.5 KB Created: 2021-03-08 08:35:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c88decbe4213d6d07e2be14b7f2c0249 SHA-1: 72f07b1a7e040e34c06367ecb71dbd99cdc8e3c9 SHA-256: 714564074c0c37540fb0667ed0a36470e9a6ea10ce6686ad52feffadf944f936
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://crophysi.ru/strik?utm_term=the+land+of+stories+book+3+word+count PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410416/normal_601efd29c929e.pdfIn PDF document text
    • https://biluvumilu.weebly.com/uploads/1/3/1/8/131860938/9602131.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401716/normal_5ff7e3954f4c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5ffd9f8305688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454420/normal_6011472b232cf.pdfIn PDF document text
    • https://vakilelem.weebly.com/uploads/1/3/1/3/131379598/kuvadebugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455406/normal_5ff6100ca5ea8.pdfIn PDF document text
    • https://kukevukoleguko.weebly.com/uploads/1/3/4/2/134265740/4619688.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_6015f0b9a912e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_603a67b3c0deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491665/normal_600ea59786735.pdfIn PDF document text
    • http://tifowarevonet.iblogger.org/gofakese.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489730/normal_602df53030d58.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/jinabisura/tombow_dual_brush_pen_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/heinemann_maths_7_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/99970341955.pdfIn PDF document text
    • http://pageziwakuvagu.epizy.com/15537964227.pdfIn PDF document text
    • http://pomigijo.rf.gd/50508132206.pdfIn PDF document text
    • http://sawokinajiralar.rf.gd/mamenaxalax.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/zemufepigozivakom.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_off0001405f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1405F 5520 bytes
SHA-256: c34ec7394b4ec392a2901c12386c64dc74a0fd834a18a9f489ebc4f017f0776e
font_01_sfnt_off0001532c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1532C 11300 bytes
SHA-256: d38e20f415b62507de26188ea074ea5f7e73323d65db2520f3fc5d87bbd29ed9

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