Malicious PDF — malware analysis report

Static analysis result for SHA-256 97aaee7c74c45fea…

MALICIOUS

PDF

71.3 KB Created: 2021-06-09 19:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9a4583bed02e22906cc75d4ea29ed4f6 SHA-1: deea94eb5aaaa4f93022a3aed5c60a2d3e19b412 SHA-256: 97aaee7c74c45feaf4a0d49cc816380701c1fcf3d5255faeb3b5a43218306497
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to potentially harmful content. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest a malicious intent to drive traffic to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://garglob.ru/pbw?utm_term=pokemon+x+%2526+y+gba+download PDF link annotation
    • https://nuxinipimop.weebly.com/uploads/1/3/2/6/132682773/f526429f8800e70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489717/normal_605f3288a5ccc.pdfIn PDF document text
    • https://texexavif.weebly.com/uploads/1/3/1/4/131454683/kiponolazudo.pdfIn PDF document text
    • https://jomopejizudo.weebly.com/uploads/1/3/4/6/134664487/9442706.pdfIn PDF document text
    • https://guzesunidami.weebly.com/uploads/1/3/0/8/130873942/bd2a41f70.pdfIn PDF document text
    • https://nuvomananakoleg.weebly.com/uploads/1/3/1/4/131453817/4647925.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450890/normal_6068f1c101e1c.pdfIn PDF document text
    • https://wuxelulomevadi.weebly.com/uploads/1/3/4/9/134904547/8520182.pdfIn PDF document text
    • https://bikujezojodu.weebly.com/uploads/1/3/4/5/134587809/8813116.pdfIn PDF document text
    • https://bosuzegenelulu.weebly.com/uploads/1/3/4/1/134131522/f8b00.pdfIn PDF document text
    • https://nowiwadigomu.weebly.com/uploads/1/3/4/0/134018048/51be40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwuwas.pbworks.com/f/49083731951.pdfIn PDF document text
    • http://nusuwoxub.pbworks.com/f/how_to_hack_someone_cash_app_without_human_verification.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deed445c-e9e2-4af7-9895-def02ce8930e/67688886156.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/f/76347226555.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1d84748-fd0d-4fbd-9f8b-3321a638659d/how_to_write_a_song_in_tamil.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_off0000dada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADA 4448 bytes
SHA-256: 446b6dbafd6e775528316f375616f83486593d4fa10dacdb6f0ceb37618f5a47
font_01_sfnt_off0000e9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F7 11364 bytes
SHA-256: 7e0586dab90743d0b8fdb568b5ea57a4d6934eef5db1529dfc8d65665001a234

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