Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f7acd600c8f238c…

MALICIOUS

PDF

70.0 KB Created: 2020-12-27 13:47:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 3ebef3e5ae0488e7f5a8906657ffe84c SHA-1: 1c8b2de927fece27de77565bbc21840b52aef57b SHA-256: 0f7acd600c8f238cd77cff5d753410db275d6bb0f24ad26569108d24e8b01ffe
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, identified as a link farm, with one critical link pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the PDF structure itself is used to host and present numerous external URLs.

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=bar+none+auction+portland+oregon+inventory In PDF document text
    • https://static.s123-cdn-static.com/uploads/4368770/normal_5fc7296b1a737.pdfIn PDF document text
    • https://fewobiwagarubi.weebly.com/uploads/1/3/4/6/134628358/jopukixapesiwogenuji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413467/normal_5fa7ab18f05bb.pdfIn PDF document text
    • https://figowemepiwe.weebly.com/uploads/1/3/1/3/131398533/8055b8eacf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367911/normal_5fc9ac7e8ac09.pdfIn PDF document text
    • https://cdn.sqhk.co/wemupaxuziv/nGij8ij/9343722137.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387825/normal_5fdc339e08781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489848/normal_5fb275cbd220d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471992/normal_5fb8e131e986f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5fa7098bce23e.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/kofabube/17682558373.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/worthy_information_in_a_sentence.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/lusuk.pdfIn PDF document text
    • https://s3.amazonaws.com/muxegeza/algebra_1_textbook_prentice_hall_online.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_off0000d197.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD197 5272 bytes
SHA-256: f3f0fa360154570c356a736919be61a80f5c2f6475fc0c770bfb8608a8d8c5d4
font_01_sfnt_off0000e3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A0 11120 bytes
SHA-256: 6925139007b63540898d0cb844e01716541da4b2e39dbaa903b84f211c4dfb40

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