Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f862a0485c5140…

MALICIOUS

PDF

82.8 KB Created: 2021-03-14 02:59:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0dceebf2d82673d20bb7d6814a204a75 SHA-1: 3c3cac722d4e6e64204723f2815b449fa0fa269d SHA-256: 34f862a0485c51407dec136993994dd15e3693cbe4b2b3cbb654910392fbdd10
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of a callback lure heuristic indicates a potential phishing or scam attempt. While no scripts were extracted, the document's structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful content.

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://jottigo.ru/123?utm_term=cet+form+2019+login PDF link annotation
    • https://xosulokut.weebly.com/uploads/1/3/4/4/134466674/zevuwuzazen-mitegepos.pdfIn PDF document text
    • http://pexulabin.iblogger.org/heartbeats_movie_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386613/normal_6000cc8c544a9.pdfIn PDF document text
    • https://fijuxibafituwu.weebly.com/uploads/1/3/4/1/134109117/d85422.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454562/normal_6022c43e5f7d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452588/normal_603d14dfba198.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392237/normal_6016ebf2f00e9.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/nadesiguva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368735/normal_601f662cf27bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418368/normal_5fd96a2dba2e0.pdfIn PDF document text
    • https://gobebirerelimi.weebly.com/uploads/1/3/4/6/134651667/xawoxiloji_jebupexola.pdfIn PDF document text
    • https://cdn.sqhk.co/vimexuda/a5Iijv8/38569380745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_604825b923fff.pdfIn PDF document text
    • http://paxebijevoz.iblogger.org/after_we_collided_soundtrack_download.pdfIn PDF document text
    • http://sovuradema.medianewsonline.com/dyson_dc25_parts_diagram.pdfIn PDF document text
    • http://rimonevo.iblogger.org/vujowonudapenavodolekex.pdfIn PDF document text
    • https://cdn.sqhk.co/gojogefe/XQtjaba/perfect_world_mobile_apk_mod.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5fce475c885fe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nezarokex.epizy.com/63724711695.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_off000106d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D6 5088 bytes
SHA-256: 758fa5bcac1497f9fadac1ba20396d044933bf7231ce4fbf2a62b0668e676f3a
font_01_sfnt_off00011819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11819 11336 bytes
SHA-256: dcb1912f369730e7b56a891d56795fd00081b3977c24c46b126531943a0ca841

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