Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3e24253c1ac8d86…

MALICIOUS

PDF

69.6 KB Created: 2021-04-24 17:15:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9df605215bc0d99166b7c3eea962caee SHA-1: 24b29d90b43f2df5fdbe12ed5c68619791a22f4c SHA-256: c3e24253c1ac8d86670f0e21118e6c8b9b6c439b04085de09b18d47c4689031f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content, likely as a spearphishing attachment.

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://golowaki.ru/strik?utm_term=rumors+neil+simon+script PDF link annotation
    • http://dakajak.medianewsonline.com/is_there_a_4th_generation_echo_dot.pdfIn PDF document text
    • https://xemakoxen.weebly.com/uploads/1/3/4/3/134320116/pedezojiv.pdfIn PDF document text
    • https://jakineporop.weebly.com/uploads/1/3/5/3/135302356/c7a2cc86adc84.pdfIn PDF document text
    • https://nudatisuwirok.weebly.com/uploads/1/3/1/3/131384101/vurifol_jodixorirekepav.pdfIn PDF document text
    • https://bopunesarikimar.weebly.com/uploads/1/3/1/4/131453984/8878290.pdfIn PDF document text
    • http://xepuxupipe.mywebcommunity.org/jegigod.pdfIn PDF document text
    • https://suvamowifav.weebly.com/uploads/1/3/4/3/134351486/tedebolerixinuw_jabiwefa_xezop_suwinoj.pdfIn PDF document text
    • https://rojurunonujimos.weebly.com/uploads/1/3/5/3/135325454/nizexekilu.pdfIn PDF document text
    • https://zefipoxiba.weebly.com/uploads/1/3/2/6/132681281/9394a260901b6.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/zetomuganubuni.pdfIn PDF document text
    • http://jenewazajasazu.getenjoyment.net/wuwab.pdfIn PDF document text
    • https://nupuwumot.weebly.com/uploads/1/3/5/3/135305030/dfde8f2b.pdfIn PDF document text
    • http://neriwor.medianewsonline.com/bezexunofoze.pdfIn PDF document text
    • http://kefijor.mygamesonline.org/athlean_x_max_size_reddit.pdfIn PDF document text
    • https://fikenetefi.weebly.com/uploads/1/3/4/7/134771518/rawevike_losekagufezevun_kibifit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/06d15867-b34a-4205-83dc-36c889e0f0e4/wewazoraxadanosurupopojub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb92bb9-9b99-4292-b7a7-9498f6ec224f/59996153645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e32520-eb8d-4198-88ea-3db4937092e0/19466510936.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_off0000d4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D9 4876 bytes
SHA-256: 528ba379a80967096b4365d0fbb61c695a2427324cad0090edf1951e839c2e2d
font_01_sfnt_off0000e561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE561 10704 bytes
SHA-256: e99b214fc83c610ff0b76bb5357aaafe13532f0de57c3dae17871d401f7b740d

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