Malicious PDF — malware analysis report

Static analysis result for SHA-256 3494e87df04a4e76…

MALICIOUS

PDF

73.8 KB Created: 2021-02-25 00:31:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: dd8eca6d91599a94be2bc267d487a00a SHA-1: 1ab678ec16b08a569bf44ebc3812c302c7329417 SHA-256: 3494e87df04a4e7676118ce368b4e37a8be9d0084f091eb05d9ef4d8d467d997
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as an external URI pointing to a suspicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's 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://seumenha.ru/award?keyword=cj+foot+atomic+physics+solutions PDF link annotation
    • https://firatilis.weebly.com/uploads/1/3/4/6/134689017/peluvewovukutibokuda.pdfIn PDF document text
    • https://vogapixafaroge.weebly.com/uploads/1/3/4/2/134234717/viruvewimawewew.pdfIn PDF document text
    • https://vekaforu.weebly.com/uploads/1/3/4/7/134747957/79b1429749.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/forawukujiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459166/normal_5ff0cbd9b8e7b.pdfIn PDF document text
    • https://likobikumenaf.weebly.com/uploads/1/3/5/9/135961418/bibewab_dokemuwidu_vonabogudawex_ruzabefol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495065/normal_6004bdca40874.pdfIn PDF document text
    • https://lusovajilabijix.weebly.com/uploads/1/3/5/3/135351537/nefiz_xibes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5ff29c8941ecd.pdfIn PDF document text
    • https://dinowupeguf.weebly.com/uploads/1/3/1/3/131379410/9904135.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofuxolisemaxim.epizy.com/rogorazedis.pdfIn PDF document text
    • http://nutimuratibuzur.epizy.com/getuwarufew.pdfIn PDF document text
    • http://gedaseda.rf.gd/58278291955.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_off0000e66b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66B 5240 bytes
SHA-256: 059776361724fb3b081dc74215aa15f1dd99016054e418276081869b2b4dbcd7
font_01_sfnt_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 10124 bytes
SHA-256: d5df81de47539d4a27e886c784c4b79e4c74417599f427876824625f7fa9a9f2

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