Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f3eb59d07714c1…

MALICIOUS

PDF

84.8 KB Created: 2021-02-28 22:26:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 76f06eb35b398f38af8d72bf58526092 SHA-1: 997c3baeddb3a32403416e3358ea195e083dbeff SHA-256: 92f3eb59d07714c115cce5f9d2ca5698116856d9cbd610ca16490ad430c1d70a
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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 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.
  • 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://baarspo.ru/strik?utm_term=how+to+recycle+canon+ink+cartridges+uk PDF link annotation
    • https://cdn.sqhk.co/bezakebijuk/Uiiijgh/penguin_isle_mod_apk_an1.pdfIn PDF document text
    • http://lozipazom.sportsontheweb.net/will_amox_clav_875_mg_treat_tooth_infection.pdfIn PDF document text
    • https://cdn.sqhk.co/dunenilufa/Uq8TW7i/big_win_baseball.pdfIn PDF document text
    • http://ravovenovibu.medianewsonline.com/19985559032.pdfIn PDF document text
    • https://balejumefem.weebly.com/uploads/1/3/0/8/130814467/118d731.pdfIn PDF document text
    • https://cdn.sqhk.co/jemitaso/Mjjjiie/zenekutulogatimuxujol.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/zgDjegg/3d_logo_maker_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/2qFjgCe/35653477488.pdfIn PDF document text
    • https://keminozabigorez.weebly.com/uploads/1/3/4/8/134886120/8b2cc35.pdfIn PDF document text
    • https://cdn.sqhk.co/tumowara/XQijJhx/grandparent_gift_ideas_for_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/zivunegas/jaRggpA/random_video_chat_app_apkpure.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/veeder_root_tls_350_paper.pdfIn PDF document text
    • http://kirakexig.mypressonline.com/73359120981.pdfIn PDF document text
    • https://cdn.sqhk.co/juvanejejuwo/iizijgj/4656833342.pdfIn PDF document text
    • https://bozadabeduli.weebly.com/uploads/1/3/4/8/134869561/4920912.pdfIn PDF document text
    • https://cdn.sqhk.co/zutigaku/eTGja9P/o_connor_studios_leominster.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tidefos.epizy.com/naruto_meets_android_21_fanfiction.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/mekedejidumitatamakex.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/fast_mental_addition_tricks.pdfIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/beef_jerky_compliance_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/nedewa.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/81835733685.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_off00010d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D24 5328 bytes
SHA-256: 2eeb0bff29f1bd31d2e55e20fe3ffd6b5932a2ca11a581c122dfa03a812ba5f4
font_01_sfnt_off00011f69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F69 11212 bytes
SHA-256: 8ffaf10d6e8c19d05c6268f7011e19f6d4ce45dfa0bf3f7403d173bc79496d5f

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