Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab7a5eb036eb820a…

MALICIOUS

PDF

100.9 KB Created: 2021-02-22 01:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 241df73036698d3c4896b136a77d62a5 SHA-1: 287f5e87a12cb9da70704cc24ab64b8cfc2c14d7 SHA-256: ab7a5eb036eb820a6919de7ff85ec7597c428184708923966c9fd3802dcfb7bc
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous embedded URLs pointing to link farms hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded URIs indicate a phishing or malware distribution lure, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=clan+of+saar+floating+factory PDF link annotation
    • https://cdn.sqhk.co/woleparos/g1jbHib/download_total_conquest_mod_apk_unlimited_crowns.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499979/normal_5ffcf8593ca92.pdfIn PDF document text
    • https://cdn.sqhk.co/delobepaziw/ahdjiif/run_it_back_turbo_song_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/lelogivotosu/ij4iiN0/mi_music_premium_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rezejigobip/WjjjgLJ/gomalebatoxatodu.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/hhxjihd/street_fighter_4_tier_list_vanilla.pdfIn PDF document text
    • https://cdn.sqhk.co/leredupodeka/dJfhhZM/mi_music_hungama_pro_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xonarewu/kgeDjfr/soccer_tactics_board_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovanixavujanu.epizy.com/liwiwosejapasajum.pdfIn PDF document text
    • http://bejitepirisobi.epizy.com/52720831709.pdfIn PDF document text
    • http://gowejolu.rf.gd/kazigujidomopowekirelek.pdfIn PDF document text
    • http://gemewepibi.rf.gd/fortnite_llama_head_template.pdfIn PDF document text
    • http://zuvemodu.rf.gd/rinepadularoxalejerunake.pdfIn PDF document text
    • http://pagupim.epizy.com/8090992674.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_off00015228.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15228 5056 bytes
SHA-256: bcb7dfc5e505e8e77c8adb2e9356fe7be38841c0c562eec28f417be1b1804da7
font_01_sfnt_off0001637a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1637A 10240 bytes
SHA-256: e480f19f0af4947224976ae708a49f86f4e23f5eba2a926cadab05471bff9f75

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