Malicious PDF — malware analysis report

Static analysis result for SHA-256 601bd27307828403…

MALICIOUS

PDF

66.0 KB Created: 2020-11-17 11:58:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 6761ecaa24b9f92843af36924f5a6a11 SHA-1: ed008182cca9ef8e559aa27d8d626d0d112db854 SHA-256: 601bd27307828403308c32a59a0d91b3739022e9ba24b43e5e417c67801a3099
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 external links, many pointing to disposable hosting services, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffine.ru/aws?utm_term=pull+data+from+another+sheet+google+sheets PDF link annotation
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/2fa2000745.pdfIn PDF document text
    • https://pumowurunumig.weebly.com/uploads/1/3/2/7/132740285/4992797.pdfIn PDF document text
    • https://rebolaje.weebly.com/uploads/1/3/4/6/134696551/9719778.pdfIn PDF document text
    • https://vigofamuzozovi.weebly.com/uploads/1/3/4/6/134671609/6bdda64657226.pdfIn PDF document text
    • https://judemozosuduj.weebly.com/uploads/1/3/4/3/134306717/8edd9a4.pdfIn PDF document text
    • https://jazexupojofon.weebly.com/uploads/1/3/1/4/131409098/467342.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390642/normal_5f9354c6f09b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416316/normal_5fa49ee6d4075.pdfIn PDF document text
    • https://meporolokiso.weebly.com/uploads/1/3/2/6/132681401/b9f36c.pdfIn PDF document text
    • https://kebudojud.weebly.com/uploads/1/3/4/4/134400915/644704.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c31d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC31D 5320 bytes
SHA-256: 78e8d6bcedfd12428769e0e4ab74190cdd1d4cdb6d458c8c9bc32f253e3bc26a
font_01_sfnt_off0000d50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 11104 bytes
SHA-256: c35eea8539e78542cd507c0083d7e9fdf50b8f6f380d014bcf9372fe85464e6e

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