Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab0f94fc5c440ed…

MALICIOUS

PDF

69.0 KB Created: 2021-01-19 17:47:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0103f70843c58e0ec855ab92c89e5a95 SHA-1: 837b6f2624ae474c1d0b830ffd4df71e6c7afec8 SHA-256: eab0f94fc5c440ed0a4bba20a246b3e3bde1a795fc4d221d3b89511639f15484
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

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 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.
  • 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://cctraff.ru/123?utm_term=beginnings+and+beyond+10th+edition+chapter+2 In PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/9581572.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/5wylvmP/unduh_exploration_craft_apkpure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5f8c49a86e145.pdfIn PDF document text
    • https://zugivosiruboni.weebly.com/uploads/1/3/1/8/131858419/15b26.pdfIn PDF document text
    • https://xonoxiti.weebly.com/uploads/1/3/4/6/134679971/zukaxopisoribav_sininop_volenoso.pdfIn PDF document text
    • https://kivepuwepadile.weebly.com/uploads/1/3/4/3/134392404/betusitoge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gixawetopoli/24756897859.pdfIn PDF document text
    • http://lojupodinitaxug.epizy.com/badrinath_movie_in_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/cds_1_2019_form.pdfIn PDF document text
    • http://sogefotatuledis.epizy.com/25574637436.pdfIn PDF document text
    • https://s3.amazonaws.com/wetevali/gajukepaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06D 5708 bytes
SHA-256: 4c9ee5228f2f83b6a6b216aa3f958b4ebaecb61a7942f5251c754ed073281591
font_01_sfnt_off0000d3d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3D2 10852 bytes
SHA-256: cc51f3f3a3d0b1aac574bce7fbdae5affac9b104d3bb1a20645fc31b4337f8ef
font_02_sfnt_off0000f8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EA 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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