Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe18cfd66ca2f4cf…

MALICIOUS

PDF

67.8 KB Created: 2021-02-27 15:05:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e76fed4e70172e3938e468a52d530a94 SHA-1: 9a081d2664325f3f7e64531e6c23ffcf31d68ebb SHA-256: fe18cfd66ca2f4cf679a187ef16688a7023d1c8a11e18c428e6b5a2bde13d118
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO spam or phishing. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites, possibly for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/123?utm_term=how+to+bypass+lid+lock+on+maytag+bravos+xl+washer
    • https://tapidokebijimub.weebly.com/uploads/1/3/4/5/134577153/bapewepiwaxaj-dekagujafemali.pdf
    • https://cdn.sqhk.co/jadizefon/avhbvjK/51161486263.pdf
    • https://cdn.sqhk.co/sogefuluf/ggswfdW/63206881020.pdf
    • http://rixorevu.getenjoyment.net/eleven_rack_review.pdf
    • https://varemajog.weebly.com/uploads/1/3/4/5/134585454/6780807.pdf
    • https://lefojokux.weebly.com/uploads/1/3/5/3/135399193/pakelukanogugenesom.pdf
    • https://mawakigimewu.weebly.com/uploads/1/3/4/8/134875352/8200750.pdf
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/raluxaroka.pdf
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/aaac78.pdf
    • https://cdn.sqhk.co/givifevulo/gwYhirQ/twitter_melania_trump_and_ivanka.pdf
    • http://vulufinagi.mypressonline.com/wedaviterinuxisutosikupu.pdf
    • https://rogubadivuna.weebly.com/uploads/1/3/4/3/134337887/8059239.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/minaxigevani/31634076214.pdf
    • https://s3.amazonaws.com/juvosi/cesarismo_democratico.pdf
    • https://s3.amazonaws.com/tipikaxe/jukogiripajiri.pdf
    • https://s3.amazonaws.com/wogikokuzotaxa/swot_matrix_template_excel.pdf
    • https://s3.amazonaws.com/falejogajir/59302397841.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca81.bin
445c0620b3147ee72faff527a649c207382bba908e9d307fd5054c6b9cb248e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA81 5976 bytes
font_01_sfnt_off0000dec3.bin
b7ee29bf68f6f0728e300083d0de139df227c0405cec61c2b7771e325154da08
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC3 10216 bytes