Malicious PDF — malware analysis report

Static analysis result for SHA-256 504f6b27289efa18…

MALICIOUS

PDF

73.1 KB Created: 2020-12-17 06:06:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 7f3398be96c5c080ef8e5b3c479633b0 SHA-1: d1196e3e629e8bda84ca191d1fed948bd1d40f2c SHA-256: 504f6b27289efa182c583a2d8c27e77985b6e80d32191a311c5c7da4d9e8cab1
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector. Another critical heuristic indicates a PDF link farm, suggesting a tactic to manipulate search engine results or distribute further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ggtraff.ru/strik?utm_term=low-organized+games+pdf In PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/sigojiperoreta-kepuxuzesopog-pajumigewo-fajugokiwi.pdfIn PDF document text
    • https://fawibilewitowo.weebly.com/uploads/1/3/4/5/134585577/30612ac1f07.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazaxazusa/lefidukava.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6a3179955c744b563435a/t/5fd0b5735347e801a826b20e/1607513460600/frontline_commando_d_day_apk_obb_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/lenejepetofedabidi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc16b033398ff751531a7f7/t/5fcd7ee61e1a4d7de141bfb9/1607302886964/head_soccer_pc_game_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf4ed9eaf37e3b6492488d/1606373081804/10677728300.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc555fff9866f3fd2f163c3/t/5fcbc45c36758319a55b61d0/1607189598251/gibanatiroduwekidaru.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc112a36609fd0ee7924cd4/t/5fc58cc3f3de5e49b5237aa3/1606782148385/fekowafajediweb.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0805cd49dd12447321748/t/5fc3371b3c6ccf69f3c705e0/1606629148205/panapoziguzutosukajebud.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/baximo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5157f3dfdd95b60f01633/t/5fcee30dcaa95a391e5ee374/1607394062074/77894127560.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5922424b06a7eb31f4865/t/5fcb6b706e74d26c6ffeb9fa/1607166837303/muvomema.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fceb868555cf06a6d12fe3d/t/5fd17e8ed97b572b89d1716a/1607564942600/tidumunidenuxivozepama.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_off0000e113.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE113 5444 bytes
SHA-256: 01635268808ef9656e46fda597c57ad8d1a25b38585b4af6bb0058c550d1f073
font_01_sfnt_off0000f3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AE 10596 bytes
SHA-256: 1ef7b9cbb9428b959b1d252932ed481c218fb42254e817d7a41dfcd1fbca4570

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