Malicious PDF — malware analysis report

Static analysis result for SHA-256 84e25d71ac49af35…

MALICIOUS

PDF

81.8 KB Created: 2021-03-01 04:32:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5806695b8910650f8f8dfcbde263af55 SHA-1: 9ebe6e2b8f4c5a620fedd3c96fe0f102d3ba9840 SHA-256: 84e25d71ac49af351d723b9fb3286aa357ea4e84b48937a6038926ffc6f30337
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, specifically flagged as a phishing trojan. It contains numerous external URIs and embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The document body, though heavily obfuscated, contains keywords related to a search query, reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/award?keyword=imovie+para+iphone+7 PDF link annotation
    • http://otshelnik.net/52909968601la4au.pdfIn PDF document text
    • https://cdn.sqhk.co/tononapiwaso/hfaawjf/72965766954.pdfIn PDF document text
    • https://cdn.sqhk.co/feripamapuv/ihEWgjv/6413833828.pdfIn PDF document text
    • http://spoonnumberone.xyz/animal_sounds_esl_worksheetsl3ef.pdfIn PDF document text
    • http://kdghy.online/dietary_guidelines_saturated_fatnve3c.pdfIn PDF document text
    • https://cdn.sqhk.co/bitaxukezor/7purnhf/prison_break_season_3_cast_sofia.pdfIn PDF document text
    • http://world-wild-shop.com/tuzixyhfmq.pdfIn PDF document text
    • https://cdn.sqhk.co/ganuniwiku/ieCT5yv/zigerezipezozekupu.pdfIn PDF document text
    • https://cdn.sqhk.co/bosamame/gOjagiB/voice_assistants_list.pdfIn PDF document text
    • https://cdn.sqhk.co/vatuliwa/UK3AmrV/74083634468.pdfIn PDF document text
    • http://streichpack.online/8368361944hv600.pdfIn PDF document text
    • http://bepibolet.22web.org/bible_verse_wallpaper_for_desktop.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/dPhjgih/funny_stories_to_tell_your_crush.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/jaWzGJW/business_strategic_planning_process_ppt.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gobipubefosoja.epizy.com/72190698750.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/monitor_cardaco_com_gps_polar_m430.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/vujogijoruxurazinezometir.pdfIn PDF document text
    • http://xiburebejevikom.rf.gd/25479627016.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/kapekekenabujezu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/universal_methods_of_design_expanded_and_revised.pdfIn PDF document text
    • http://defasawune.epizy.com/nemab.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED34 4924 bytes
SHA-256: 77299af73618fb5cc6040db39b784f1e6f8df074cf979d128fcb3f91d84c7165
font_01_sfnt_off0000fdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD3 10264 bytes
SHA-256: f8605ed96c209421a2faf143f94c1a56a5541be9b45c82bf46f69e324ab90799
font_02_sfnt_off0001210c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210C 17172 bytes
SHA-256: 903df1d5dd28bfc9aab1aae188142db5d9de952176d9fbd81946173efd64f04d

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