Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c092cfa3224079…

MALICIOUS

PDF

80.3 KB Created: 2021-01-17 20:50:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 9f54dfa0a37d4885fa86d9107e003564 SHA-1: 9a6da3a6cb91d21a37cf882e0412e7d12d9a3d68 SHA-256: 61c092cfa322407942bfde2ee35b0820ecd98dff76583806e456524ef57bd1aa
126 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 by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document contains numerous links to disposable hosting, likely to obscure the true malicious destination. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=applied+predictive+modeling+kuhn+pdf PDF link annotation
    • https://kikuriniwabutip.weebly.com/uploads/1/3/4/4/134440093/eecf511a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467278/normal_5fe164cd7f061.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493266/normal_5fbbc213a7990.pdfIn PDF document text
    • https://kirenokasanav.weebly.com/uploads/1/3/4/4/134445236/wigajo.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/fiwipexew_josajozonipi_datadog_felom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_5ff3e58602729.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/iiihbhi/cheats_for_minecraft_xbox_360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393506/normal_5fb2622411688.pdfIn PDF document text
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/9651460.pdfIn PDF document text
    • https://zabamaki.weebly.com/uploads/1/3/4/8/134849969/rugusejod_fabenaroxun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvafinuvewabek.epizy.com/ancient_history_questions_for_upsc_prelims.pdfIn PDF document text
    • http://bamusob.rf.gd/47770267537.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/wubulovivipeduwitipaziram.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxulikiwab/borders_for_certificates.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/33353071987.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/22327114908.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/40202384935.pdfIn PDF document text
    • http://selifesupenikiv.epizy.com/gathering_dreams_income_report.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/2019_cadillac_xt4_owners_manual.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_off0000ff01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF01 5292 bytes
SHA-256: 3a80f29c6b4bce0da73fa43b1f44d3062424362d71f1575a177d51ed9d566a7d
font_01_sfnt_off000110e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E5 10188 bytes
SHA-256: dc094b6e5ad910b93caa9b9dd9a1ed22a5f9047a413c22a3e3ffbf9d68b1250a

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