Malicious PDF — malware analysis report

Static analysis result for SHA-256 02089e4da2b9c859…

MALICIOUS

PDF

78.1 KB Created: 2021-03-12 17:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a357f2916a53df42e3cff0fac65b65f3 SHA-1: c80a7ab000a547c328752388124f154f883484e9 SHA-256: 02089e4da2b9c859f343701420b45ff84dc8106637c0273898587602d6684c91
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1071.001 Web Protocols

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to distribute malicious content. The 'SE_MFA_LURE' heuristic indicates the document is likely a credential harvesting lure, attempting to trick users into providing sensitive information. The ML classifier and ClamAV detection strongly support its malicious nature. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://xezojetit.ru/123?utm_term=safety+data+sheet+definition+of+terms PDF link annotation
    • https://zejeranuko.weebly.com/uploads/1/3/4/6/134649068/5a8ed7b8e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487927/normal_5fd317a88b756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459470/normal_601aeff1dd186.pdfIn PDF document text
    • https://wejitefokok.weebly.com/uploads/1/3/1/1/131164199/9676300.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/what_is_twitters_mission.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/72670574656.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408718/normal_5fcf26655463e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446500/normal_604accb163404.pdfIn PDF document text
    • http://nutosolawuxa.iblogger.org/21025698342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458421/normal_601d1af5393c3.pdfIn PDF document text
    • https://tovibebifenoge.weebly.com/uploads/1/3/2/6/132695438/c44b00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_602ceea8e707c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puwukuju.epizy.com/kasen.pdfIn PDF document text
    • http://rawuwad.epizy.com/66810656116.pdfIn PDF document text
    • http://rapuwovire.rf.gd/samsung_ml-2165w_toner_cartridge_price.pdfIn PDF document text
    • http://merijezogaxik.epizy.com/31089610360.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_off0000f53d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 5320 bytes
SHA-256: 22bc1389a46bf3e2520731ca4f8c94e66fc0877af58a108be5cfdb5f1e5de78e
font_01_sfnt_off0001073a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073A 10584 bytes
SHA-256: 60805d9a00b8c374ab3b66e81a015c936147f6bb1cd46d9e365cc679e20c15b7

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