Malicious PDF — malware analysis report

Static analysis result for SHA-256 115501426e49fe68…

MALICIOUS

PDF

94.2 KB Created: 2021-02-24 18:23:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0df358a37f5a822375ab53ce32d47b7 SHA-1: d5bc41489996a0015ff3f16d85a2392bee6ed5e9 SHA-256: 115501426e49fe68155bf3a9081be97388c40cb35170074321d46648eb7550e7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF document contains numerous external URIs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to 'dogs and cats'. The presence of embedded URLs and the overall structure suggest it's designed to redirect users to malicious sites for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=list+of+difference+between+dogs+and+cats
    • http://site-shop.xyz/99510790122ad234.pdf
    • http://dedarijaluwonu.22web.org/vedawamisojaxuwi.pdf
    • http://webpost.pro/detailed_swot_analysis_examplesmgipg.pdf
    • https://cdn-cms.f-static.net/uploads/4379744/normal_6029e102552b9.pdf
    • http://soxabezavusuxud.22web.org/celebrate_recovery_the_landing_lessons.pdf
    • https://cdn-cms.f-static.net/uploads/4367656/normal_600c73c04ce4a.pdf
    • https://static.s123-cdn-static.com/uploads/4456667/normal_5fce864a3cce4.pdf
    • https://static.s123-cdn-static.com/uploads/4492259/normal_5fde33dc781a1.pdf
    • http://didezidise.22web.org/jaguar_car_race_video.pdf
    • http://wiwafapudipib.iblogger.org/45817861889.pdf
    • http://centerverifybadge.com/texas_archery_shooters_association4it2z.pdf
    • http://surivapofoja.iblogger.org/is_fifty_shades_of_grey_free_on_amazon_prime.pdf
    • http://copyrightsupport-ig.com/bawudamofemofiduodke8.pdf
    • http://figojusu.iblogger.org/64743917014.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sowewazulejewi/javascript_spreadsheet_grid.pdf
    • https://s3.amazonaws.com/rerinago/sahi_bukhari_hadees_in_urdu.pdf
    • https://s3.amazonaws.com/goviwigax/carriage_inn_haubstadt_menu.pdf
    • http://sejojoxo.epizy.com/android_phone_file_manager_for_mac.pdf
    • http://mupeluzapuwefa.rf.gd/vikiw.pdf
    • http://zewogukanonudut.epizy.com/business_success_factors.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_off00012f9a.bin
92769b4c34251794b578fe5ac93fa0e2a7f784c2edf27c20d3d4400fea465900		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12F9A 5328 bytes
font_01_sfnt_off000141e0.bin
3c06dfcf918e8203406cf7ccf8b6843b4327a83746fde0dc293a16c5572323f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x141E0 12692 bytes

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