Malicious PDF — malware analysis report

Static analysis result for SHA-256 2723046f826f71b9…

MALICIOUS

PDF

72.1 KB Created: 2021-02-15 17:24:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 33f32d2bc4eb24ec0ec643050f0a55a0 SHA-1: 2f8c56271d82f4062bc7faeefc2e067581fe515c SHA-256: 2723046f826f71b95be7a6cc4c3c95d7a191ca9fc2743d8a32a387c17e263d11
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 and Weebly-hosted files, indicative of a link farm designed to distribute malicious content or phish for information. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious attack pattern.

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://druttle.ru/strik?utm_term=tipping+point+radio PDF link annotation
    • https://jikumuwalomaj.weebly.com/uploads/1/3/1/3/131383204/doxoxapuza.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/supefuladaweguwoni.pdfIn PDF document text
    • http://ellmax-site.xyz/how_to_download_turbo_c_compiler_for_windows_10e7t46.pdfIn PDF document text
    • http://afracheat5.xyz/ap_reorganisation_act_2014_in_teluguw4sk2.pdfIn PDF document text
    • https://tevunuxewime.weebly.com/uploads/1/3/1/4/131452804/4a8615.pdfIn PDF document text
    • https://redojakora.weebly.com/uploads/1/3/2/6/132682723/a45b62c.pdfIn PDF document text
    • https://cdn.sqhk.co/neviragar/VbgfmpL/big_blue_marble_waxhaw_north_carolina.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365652/normal_5fe39853c4694.pdfIn PDF document text
    • http://milanbeach.fun/vasopcwbvf.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/hODGhii/29591007189.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/zunemagate.pdfIn PDF document text
    • https://sopunarexij.weebly.com/uploads/1/3/1/8/131857112/xemuzirepapupa.pdfIn PDF document text
    • http://copyright-infringement.business/screen_printingn8c0k.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gomupinoteripa.epizy.com/11524993711.pdfIn PDF document text
    • http://lakiver.epizy.com/76278476598.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_off0000dc97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC97 4864 bytes
SHA-256: 1d5d355127289b1bdc226a055b38d61a369c6ed7440c7a5890766ab3cbebb195
font_01_sfnt_off0000ed30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED30 10796 bytes
SHA-256: 5631a5fa49f818d2f9a405f4a6796bb73efd07e4d7868790913e42920f44c336

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