Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15366e56db33838…

MALICIOUS

PDF

124.5 KB Created: 2021-03-09 07:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 974104b9fc6d4305590d070a306aa2b6 SHA-1: 6c0f368f9a81afacfab913aebce95e74ff7a410d SHA-256: d15366e56db33838e46fc16201a2fa6febf3a1f8d6124318a33ee4ed433c9d04
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used 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://jumiwimov.ru/123?utm_term=britney+spears+womanizer+song PDF link annotation
    • https://radixukawatezod.weebly.com/uploads/1/3/4/6/134645496/pefifefokojiporimi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501214/normal_60033a29c6ae5.pdfIn PDF document text
    • http://webpost.pro/compaq_presario_cq57_pricek77ot.pdfIn PDF document text
    • https://wofofubuw.weebly.com/uploads/1/3/2/7/132710679/b44b030a.pdfIn PDF document text
    • https://tubuporupuruder.weebly.com/uploads/1/3/4/8/134879971/1911537.pdfIn PDF document text
    • https://femobideja.weebly.com/uploads/1/3/4/7/134735935/dotizifawuxez_wojorapudi_bufojaveku_pixifolu.pdfIn PDF document text
    • https://fujinimozebuxe.weebly.com/uploads/1/3/0/7/130738673/3704502.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415304/normal_5fc8b60d1a8b5.pdfIn PDF document text
    • https://cdn.sqhk.co/mokevesin/ificjbl/76809724005.pdfIn PDF document text
    • http://copyrightsafetyhelps.com/259970695829zmpa.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8123255.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/jfZpp10/visit_london_official_city_guide_app.pdfIn PDF document text
    • https://nasaxedinevizuv.weebly.com/uploads/1/3/4/7/134759800/3135798.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/4462165.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://beliraguw.onlinewebshop.net/hunter_douglas_motorized_blinds.pdfIn PDF document text
    • http://nukilaba.myartsonline.com/49723923777.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/huckleberry_finn_character_analysis_in_tom_sawyer.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000193cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193CD 5400 bytes
SHA-256: f0454b880de5acbc3200d5ba149c86d3406210e7badefffd815033a531ca6ee3
font_01_sfnt_off0001a63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A63D 12792 bytes
SHA-256: fbeb731165a57780ef464290fe05e1ba78e43359f4afdc3bb6addf77b52bdc9e
font_02_sfnt_off0001cf4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF4D 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208

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