Malicious PDF — malware analysis report

Static analysis result for SHA-256 71eba4391d519b79…

MALICIOUS

PDF

71.3 KB Created: 2021-05-08 19:04:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5ff01497c2d349c405253a7d907cb50 SHA-1: 789c2320c072c43517475f5167853cdd9e0cf297 SHA-256: 71eba4391d519b79c91482533374157332b951a35f4964a8339e72ada83e36e5
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malicious redirection scheme. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user clicks, further supporting a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/strik?utm_term=bedford+handbook+10th+pdf
    • http://pinezov.iblogger.org/ponig.pdf
    • https://pokumowudo.weebly.com/uploads/1/3/0/7/130740164/woboxoga.pdf
    • http://tuimag.ru/acorn_130_stairlift_manualiiii5.pdf
    • https://cdn.sqhk.co/xixofivib/wgYjgib/ninja_foodi_healthy_recipes.pdf
    • http://leadtop.co/gideperuji8nn3w.pdf
    • https://joweralifaj.weebly.com/uploads/1/3/4/3/134350132/9047312.pdf
    • https://cdn.sqhk.co/sigidezok/igdhdc6/zigzagstripe_coupon_code.pdf
    • https://cdn.sqhk.co/fukonovum/wFFVoif/oof_clicker_extreme.pdf
    • http://italiahot.space/22836261724m43d9.pdf
    • https://guditeni.weebly.com/uploads/1/3/4/5/134529862/zeludelipirenuwe.pdf
    • https://cdn.sqhk.co/dabebasavus/pejjmgj/song_pop_2_download_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://pazatirademe.rf.gd/74126980551.pdf
    • http://sidiwen.epizy.com/tomerazubir.pdf
    • https://s3.amazonaws.com/gazitif/vijufekimamidonubevam.pdf
    • https://uploads.strikinglycdn.com/files/0a2b851c-1d8b-4476-88ab-b8dcf23e039b/nikon_d40x_price_in_nigeria.pdf
    • https://s3.amazonaws.com/dazifozixawus/vaniwowafovodasu.pdf
    • https://s3.amazonaws.com/wupagivoz/bumogab.pdf
    • https://uploads.strikinglycdn.com/files/cf4cddac-aa0e-4437-ae27-c84f76cf7480/city_of_houston_mechanical_engineering_jobs.pdf
    • http://begulazelukej.rf.gd/dayton_battery_charger_manual.pdf
    • http://bugigumu.epizy.com/39726355336.pdf
    • https://s3.amazonaws.com/sowewazulejewi/62089624551.pdf
    • https://s3.amazonaws.com/muxegeza/d_d_tiefling_warlock_character_sheet.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_off0000d87a.bin
9e2103e68773004b03e706fe19aac9bec053a4ee9d0d6d5e5e11bfeb8008dadc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD87A 5368 bytes
font_01_sfnt_off0000eab6.bin
2927813067964b3255fe49152703d92482ab0eb5f98a1dd749fc331094b3e845		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB6 10792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.