Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e89927354852106…

MALICIOUS

PDF

64.8 KB Created: 2021-03-02 21:50:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5065f412f64930d2e1e74311dd38a922 SHA-1: 8f5dbcf247a3f4b12308e16d491325026c642051 SHA-256: 5e89927354852106171a32b3983c9f652877b2829f8ac99536d28b82a3999dbe
206 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm and potential phishing lure. The document contains numerous external links, including one to 'xezojetit.ru', suggesting an attempt to redirect users to malicious sites. The presence of a 'callback phishing phone lure' heuristic further indicates a social engineering attempt, likely to trick users into revealing sensitive information or downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/infin?keyword=database+systems+the+complete+book+solutions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412573/normal_603926d0355a9.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/11181315900.pdfIn PDF document text
    • https://nopuwilimo.weebly.com/uploads/1/3/4/4/134490360/joxoxunupigof-nafinodevu-gonuwelefuwexas-wegejuwesalukuk.pdfIn PDF document text
    • https://talidifixuj.weebly.com/uploads/1/3/5/3/135390844/be01729c3ce.pdfIn PDF document text
    • https://dasowafajego.weebly.com/uploads/1/3/4/7/134723411/c2bd07313f3c516.pdfIn PDF document text
    • https://lepekogiba.weebly.com/uploads/1/3/1/6/131637498/88204a1555af8.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/egcGo19/dialogflow_cx_vs_es.pdfIn PDF document text
    • https://sisareses.weebly.com/uploads/1/3/1/4/131454440/a7f40f1.pdfIn PDF document text
    • https://bateworolod.weebly.com/uploads/1/3/4/3/134315912/bekuloxikujagotoki.pdfIn PDF document text
    • https://kilexudu.weebly.com/uploads/1/3/5/3/135347894/3838018.pdfIn PDF document text
    • https://xotubowewetiner.weebly.com/uploads/1/3/2/6/132696149/b49d5.pdfIn PDF document text
    • https://fezagexagowib.weebly.com/uploads/1/3/5/3/135313062/a6286aa1dbfb221.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sigedasubaduvep.rf.gd/fogipezibiworowiw.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_off0000c11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC11F 5384 bytes
SHA-256: a62e6ca862f6c66283028abaebb50643815a05c717ca6be4d29ef778e37cc3b0
font_01_sfnt_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 10220 bytes
SHA-256: dfb3b9bf7623b673e2372d0981440b640acd94a423bf2c65c5b092e16d6abac9

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