Malicious PDF — malware analysis report

Static analysis result for SHA-256 9393cad866a18665…

MALICIOUS

PDF

78.4 KB Created: 2021-03-23 13:48:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 67d5e84ee55d3fe971099e3564d94970 SHA-1: 294270bc647f235d07d83ee60f1e45f5be3e4fc6 SHA-256: 9393cad866a18665c7c2b7277fe26f5bb041dcb9383f0ac9580bf63913094254
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, forming a link farm designed to appear as search results for specific keywords. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/award?keyword=akbar+birbal+stories+in+english+with+moral+pdf
    • https://buwofapakudo.weebly.com/uploads/1/3/5/3/135316190/0862e79a835.pdf
    • https://cdn.sqhk.co/wolonevavaru/ijicGig/72008998777.pdf
    • https://cdn.sqhk.co/zamepeja/cjiTgjw/stick_war_legacy_mod_apk_iphone.pdf
    • https://jipuziloki.weebly.com/uploads/1/3/2/6/132695969/26c5e.pdf
    • https://dojunulopifo.weebly.com/uploads/1/3/4/4/134445836/5458015.pdf
    • https://sinukofulav.weebly.com/uploads/1/3/4/6/134634738/3188000.pdf
    • https://cdn.sqhk.co/xapewiwud/hdVEXaR/76773812204.pdf
    • https://cdn.sqhk.co/lasesekov/gdSLzus/99833594776.pdf
    • https://cdn.sqhk.co/sebutarukaw/dWiblii/gowovunuliwem.pdf
    • https://cdn.sqhk.co/xuxozowaki/hShfMaz/neo_geo_x_gold_system.pdf
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/mipoworuvo-jumegunobadu.pdf
    • https://tepidupelagoxu.weebly.com/uploads/1/3/4/4/134472529/4dbc30173c28d.pdf
    • https://cdn.sqhk.co/movozuba/Mhew5hj/how_to_play_solitaire_online.pdf
    • https://cdn.sqhk.co/melipetoluf/pdhejji/word_attack_strategy_definition.pdf
    • https://cdn.sqhk.co/gotulurowav/uhfgjih/26531436337.pdf
    • https://cdn.sqhk.co/wifuponi/ZgfmFUK/viliterixi.pdf
    • https://cdn.sqhk.co/xorakulenido/gj5GXji/aaon_rm_series_service_manual.pdf
    • https://cdn.sqhk.co/maxegugej/mnjgdjc/baby_bird_rescue_los_angeles.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gajabedafot/xumabozolig.pdf
    • https://s3.amazonaws.com/mexavofezoxi/94549461886.pdf
    • https://s3.amazonaws.com/wazagidonux/96308915065.pdf
    • https://s3.amazonaws.com/zinudipir/altered_carbon_cast_season_1_episode_3.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_off0000f528.bin
fe4270776e35ebbb27795016a015c399fd04e500b911185832267ed4a147e7a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 5740 bytes
font_01_sfnt_off00010898.bin
5b31dcea9e36612879cc7e7e0d3380c44a7e313e16046903d8dc6b27f35feee2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10898 10424 bytes

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