Malicious PDF — malware analysis report

Static analysis result for SHA-256 9102caddf14baa69…

MALICIOUS

PDF

79.2 KB Created: 2021-02-20 23:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ce4182a0c5331bfcfbfd6d3eb9bf0d14 SHA-1: aced189ebb78cba2868b35704763219bde95e95f SHA-256: 9102caddf14baa699b1376d99be26c3400bfed774e3d265fe7a31f9ea924eb42
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, and one specifically uses a 'watch movie' lure in its UTM parameters. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed for malicious redirection. While no scripts were explicitly extracted, the presence of external URIs and the overall structure strongly suggest the document is designed to redirect users to malicious sites, likely for malware distribution or phishing.

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://jottigo.ru/123?utm_term=watch+pride+and+prejudice+2005+online+with+english+subtitles+hd PDF link annotation
    • http://zavodtriumf.com/49673147856cg5gl.pdfIn PDF document text
    • http://natur-green.fun/225203819318dxn3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445888/normal_602e0970af2ce.pdfIn PDF document text
    • https://pogunokele.weebly.com/uploads/1/3/0/7/130739789/7341389.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445325/normal_5fcbe42b92769.pdfIn PDF document text
    • http://varistop.site/jamuwozosavivekj58aj.pdfIn PDF document text
    • http://misstourist.info/43004213050f7ie9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476569/normal_6016b35d8202c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375361/normal_5fef623adf81f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388824/normal_600e2f6849c2c.pdfIn PDF document text
    • http://cccckkkkkdd.space/spanish_1_capitulo_1a_answersvz2e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fef45b8787cc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godutiliwaganos.rf.gd/acne_e_erupes_acneiformes.pdfIn PDF document text
    • http://fekalalorupip.rf.gd/fizulaxuwemur.pdfIn PDF document text
    • http://kupavojos.epizy.com/loosening_the_grip_10th_edition.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_off0000f0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 6052 bytes
SHA-256: 375f778401138095f53405a245a6564c3ee9d87209ffe3e0c9a92109f9d756f5
font_01_sfnt_off00010587.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10587 12976 bytes
SHA-256: 7678e08056f2a4f4a82218b95e3f30acb3b5090aa2b33772a22f29c80a9087df

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