Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeb5d27310ab80cd…

MALICIOUS

PDF

81.6 KB Created: 2021-03-17 10:47:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6face841564a58d8e3eb9e40d52da6e2 SHA-1: 58b9aa5982be7a554fca188f7ac5c66d185fb767 SHA-256: eeb5d27310ab80cd98c818c20905cb405c297691c041dbf549f39a2bc572af5e
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards a spearphishing attachment attack vector.

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://vilenefex.ru/wix?keyword=pacemaster+proselect+treadmill+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443354/normal_6023d71c1f991.pdfIn PDF document text
    • https://cdn.sqhk.co/sugutomipu/ii6Gifo/60953409765.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459468/normal_5ff468bc0e0f3.pdfIn PDF document text
    • http://deteluwo.iblogger.org/piguvitosefuwatekij.pdfIn PDF document text
    • http://puvememora.22web.org/nikon_p223_3x32_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418788/normal_5fd2556f17449.pdfIn PDF document text
    • https://cdn.sqhk.co/kupujape/iLGd6ij/superhero_run_lodi_ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374703/normal_604d0235dcb91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_60492ee4ae71a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wubonaxe.epizy.com/set_background_colour_java_android.pdfIn PDF document text
    • http://jadokekuw.rf.gd/21975482905.pdfIn PDF document text
    • https://s3.amazonaws.com/figugipopar/lavovomo.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/honda_2000_generator_spec.pdfIn PDF document text
    • http://wetafemef.epizy.com/free_meeting_agenda_and_minutes_template.pdfIn PDF document text
    • http://zaxukesaludu.epizy.com/electronic_devices_and_circuit_theory_10th_edition_solution_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/colonial_comparison_chart.pdfIn PDF document text
    • http://ketugida.rf.gd/bangla_comedy_pic.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/speaking_english_practice_conversation_questions_and_answers_english_conversation_with_subtitle.pdfIn PDF document text
    • http://kegunujav.epizy.com/bowling_performance_in_world_cup_2019.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_off00010295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10295 5220 bytes
SHA-256: 97260fa554c0259c88c9d3ca09775250e480ca08a2d4b23227adcca0e4663168
font_01_sfnt_off0001143a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143A 10836 bytes
SHA-256: 4ae0990a8a3ae44f01a055d677cad96b329e0763e2914f398306d90a665bb1db

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