Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cd2d3930a4e0793…

MALICIOUS

PDF

86.8 KB Created: 2021-02-28 03:19:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: bfb8392997167d9b7b439229574c56c4 SHA-1: c84240517e74ecad6aa4deb6a3baa42b67491a38 SHA-256: 1cd2d3930a4e0793896198dc90a872d8427a3a3368b5018e2dc290b0e460c74e
134 Risk Score

Malware Insights

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

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of urgency lures further supports a phishing or social engineering attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jacksth.ru/award?keyword=chicco+keyfit+30+stroller+reviews PDF link annotation
    • http://lobulezinovux.medianewsonline.com/how_to_factory_reset_hp_officejet_4630.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/R892jg6/24974559898.pdfIn PDF document text
    • https://fibarivinudew.weebly.com/uploads/1/3/5/3/135387866/giweru.pdfIn PDF document text
    • https://wenuzivubog.weebly.com/uploads/1/3/5/3/135392435/mesamatij_zaxebuxikuga.pdfIn PDF document text
    • http://balegetiwep.mywebcommunity.org/tukonujanezikuferorefun.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/what_sandwiches_are_5_at_subway_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xivefasojag.epizy.com/puwekijune.pdfIn PDF document text
    • http://velumosak.epizy.com/registration_form_sample_template.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/best_oil_paint_for_alla_prima.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/what_are_you_searching_for_quotes.pdfIn PDF document text
    • http://fupofew.epizy.com/nexo_causal_derecho_penal.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/27422362072.pdfIn PDF document text
    • http://livikunaxexo.rf.gd/attitude_personality_test.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_off00011706.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11706 5288 bytes
SHA-256: dfbfd3128e80d611bc59005bc5f5928b8f8c4311689d18aebcb3625771dcfd9c
font_01_sfnt_off00012921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12921 10740 bytes
SHA-256: 6ca936831ddc00ad67fc82076dd53a8d1f813b0529856eebc23c6b1d8a4fd5fa

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