Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0158611f0014764…

MALICIOUS

PDF

126.5 KB Created: 2021-02-17 13:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 214d00dfaa611ebd56782ce7a3b7b9e2 SHA-1: 2cb2fa051ca117b778651a53cc011b3161e7065e SHA-256: a0158611f001476471fa56827e900173ac727a7883869b02d79ee5c084535a41
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm designed to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the 'download button' heuristic further support the conclusion that this document is intended to trick users into navigating to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/strik?utm_term=driver+dell+optiplex+790+windows+xp PDF link annotation
    • http://vuxokiwi.22web.org/wojosonakiwejitaramoxez.pdfIn PDF document text
    • http://doruguduku.iblogger.org/49719134004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468831/normal_6002a96883581.pdfIn PDF document text
    • http://vakakuwumegus.22web.org/zabis.pdfIn PDF document text
    • https://cdn.sqhk.co/nopawuwam/iaj6khg/26746180095.pdfIn PDF document text
    • http://kininorekuwif.iblogger.org/68624174775.pdfIn PDF document text
    • http://xopodezilodule.iblogger.org/harp_ensemble_free_sheet_music.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tokit/book_meditations_marcus_aurelius.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/wegugivetivizefamewavat.pdfIn PDF document text
    • http://jeloneliva.epizy.com/massachusetts_answer_to_complaint_form.pdfIn PDF document text
    • http://toxogeparami.epizy.com/nesofafupag.pdfIn PDF document text
    • http://fexewon.rf.gd/80558042964.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/bitdefender_antivirus_scanner_for_unices_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A539 5128 bytes
SHA-256: 3568a6b66eafd92ae95f095ac5e1255d31dde0685f2de80cd63ce11ad7fdc723
font_01_sfnt_off0001b6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B6DD 12640 bytes
SHA-256: 2cce0f9de5c6bb034e7f38da9356e1c09373cc63d1b33933b86b4f845bc7edaf
font_02_sfnt_off0001de47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE47 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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