Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac59d4d440a6de37…

MALICIOUS

PDF

72.9 KB Created: 2021-01-27 07:39:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6452dbd7e8d29be80cbf8e69d472a631 SHA-1: 3b9aa0a5b7d3bb38ccda025f3f9933b83d621964 SHA-256: ac59d4d440a6de37835df05408a42ee47f25c35ec66dd02e9452111c17240ac7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable domains and link farms, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to a product manual, aligning with phishing tactics.

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=tbs+unify+pro+hv+race+25-200mw+manual PDF link annotation
    • https://zipobirin.weebly.com/uploads/1/3/5/3/135386694/vorirune_bulobabug_widoxogulika.pdfIn PDF document text
    • http://bestplacefor.rest/vasigefoxomixowigurifzg31c.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/5119900.pdfIn PDF document text
    • http://kengoru.space/10330470341t6i1e.pdfIn PDF document text
    • http://znasila.ru/visamaletu7glhl.pdfIn PDF document text
    • http://fabermanufacture.ru/amazon_prime_now_whole_foods4zjwe.pdfIn PDF document text
    • http://gravkamen.ru/princess_and_the_frog_castlev0ds4.pdfIn PDF document text
    • http://expressday.online/wrong_turn_7_full_movie_download_in_hindi_dubbed_300mblbbrj.pdfIn PDF document text
    • http://rameautbxy.space/25665070184it1xj.pdfIn PDF document text
    • http://pipvip.ru/wifi_file_transfer_apk_for_pced55g.pdfIn PDF document text
    • http://load-bcp.com/812837660330csth.pdfIn PDF document text
    • http://blue-tick-central.com/snake_vs_block_game_play_onlinetj8z2.pdfIn PDF document text
    • http://storezone.info/widaxititezemazoytp.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gefuxexo.epizy.com/82524699618.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/jurassic_world_mod_apk_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/arjun_pandit_movie_songs_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/wamabukakomewixexosa.pdfIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/46024249866.pdfIn PDF document text
    • http://vaxomuterok.epizy.com/blundells_school_uniform.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_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 6028 bytes
SHA-256: 1dc51a9bc72c261af1552aab8ec43e15726e926719c5e44d52119d1e2e3c842f
font_01_sfnt_off0000eda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA3 11396 bytes
SHA-256: faa5d28182f79de087d511c70cdb7be970babc753817d16c47e3cb7e3310b3df

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