Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b384ce05936190f…

MALICIOUS

PDF

79.7 KB Created: 2021-03-24 09:28:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 62b48ed7619f084da5cbc5dc4a280fff SHA-1: d632c42e908f0fa0f68f545e0448820418bf8f08 SHA-256: 8b384ce05936190ff11ab1b461eb4ab944e43c0b1784044c80740b75fb8144e5
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a 'link farm', suggesting a phishing or content-scraping motive. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of a malicious document designed to redirect users to potentially harmful websites.

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 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.
  • 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://fokemale.ru/123?utm_term=online+automotive+repair+manuals+free PDF link annotation
    • https://moxuronanupew.weebly.com/uploads/1/3/4/5/134597487/resugu.pdfIn PDF document text
    • https://zoxalutaj.weebly.com/uploads/1/3/1/4/131407742/6d0e44d3571.pdfIn PDF document text
    • https://kukitarigawe.weebly.com/uploads/1/3/0/7/130776277/1799781e.pdfIn PDF document text
    • https://gazuxupoje.weebly.com/uploads/1/3/4/1/134108966/6443599.pdfIn PDF document text
    • https://xonasuxodu.weebly.com/uploads/1/3/2/6/132681295/rutovifaxusabika.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402519/normal_5fff5a74d2fbd.pdfIn PDF document text
    • https://tiseworadew.weebly.com/uploads/1/3/5/3/135317060/afd24a81340e2f.pdfIn PDF document text
    • https://wejitefokok.weebly.com/uploads/1/3/1/1/131164199/jidum.pdfIn PDF document text
    • http://tameenegypt.com/2019_ford_mustang_super_snake_hpw5fr3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_601a1b7dee2b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419826/normal_605a6995f2d55.pdfIn PDF document text
    • http://winoorama.fun/799038176724lkx5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/96850863362.pdfIn PDF document text
    • https://f3b8d348-8566-49c9-a9f8-a2c3b9e1bc8e.filesusr.com/ugd/f1c748_b5941580a5ec490b87c88252d03247c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/udhr_article_19.pdfIn PDF document text
    • https://s3.amazonaws.com/goviwigax/93372408352.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/mime_type_application_octet-_stream_free.pdfIn PDF document text
    • https://2e8e3215-33bf-4fe1-bc67-b38dac560527.filesusr.com/ugd/269bb8_27dd4b21f0a24769b362ae7628489f50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wozoxub/35108276284.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_off0000fc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2A 5136 bytes
SHA-256: a249c770a55dd6e5b8d59251fb3cbdd7cb5b6d674855cb45e0917ea5562cf2a2
font_01_sfnt_off00010d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8B 10544 bytes
SHA-256: 1650531f0c5c55275eaa10f709f21e9b1ce2053c84b6f982aafabad34d2b1826

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