Malicious PDF — malware analysis report

Static analysis result for SHA-256 c43d0d779784e183…

MALICIOUS

PDF

75.7 KB Created: 2021-06-11 03:03:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b1cb3da80d97538cfb86049f866d3a42 SHA-1: ea289219335d58d26f761efa84a9fb8ec8c014dd SHA-256: c43d0d779784e1831446400b53d7922b597f3077c386c819a562399dd275ee92
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous links to disposable domains and is flagged as a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful content.

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://philabc.ru/pbw?utm_term=archive+messages+in+messenger+android PDF link annotation
    • https://xewomilofapo.weebly.com/uploads/1/3/4/8/134878854/3388354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_5fdc157b40f49.pdfIn PDF document text
    • https://medumoxil.weebly.com/uploads/1/3/1/0/131070238/dejosusarawevew.pdfIn PDF document text
    • https://pubepisun.weebly.com/uploads/1/3/4/5/134594909/ximubukafet_dadasar_pitufeza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405899/normal_5fcb21a687463.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kimotamiju.pbworks.com/f/pmay_online_application_2020.pdfIn PDF document text
    • http://mefijunov.pbworks.com/w/file/fetch/144951600/luzagenotaterufigezabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d076008-269e-4599-89d2-89a623278f5c/ti-89_titanium_manual_dansk.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/sivaji_ganesan_old_songs_tamil.pdfIn PDF document text
    • http://juxivos.pbworks.com/w/file/fetch/144734229/tubiwugezubivowuzuki.pdfIn PDF document text
    • http://nalujoxerisi.pbworks.com/f/kitoxidezokibewexoj.pdfIn PDF document text
    • http://tomabekaf.pbworks.com/w/file/fetch/145088307/mission_mangal_2019_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dec62ddd-9bd7-42f0-a5ba-74a1ce0f5dd8/how_to_get_adoption_certificate.pdfIn PDF document text
    • http://gezebal.pbworks.com/f/multiplication_problem_for_grade_3.pdfIn PDF document text
    • http://botinuba.pbworks.com/w/file/fetch/145093467/king_of_the_forest_herb_benefits.pdfIn PDF document text
    • http://ruwezebom.pbworks.com/f/mini_dv_kamera_md80_software_download.pdfIn PDF document text
    • http://madatev.pbworks.com/w/file/fetch/144600438/general_chemistry_petrucci_10th_edition_solutions_manual.pdfIn PDF document text
    • http://sufizilofab.pbworks.com/f/fodojixuf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED68 5368 bytes
SHA-256: b78a2d8a6202363296999be516599fff0dd1631c4bb2010d78c02589267cc670
font_01_sfnt_off0000ff84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF84 10280 bytes
SHA-256: 6054f81258aaad6aac1affbf75de93212066ef1c72b9995d861c30815b475636

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