Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e9fd29fbbd5e6e…

MALICIOUS

PDF

94.5 KB Created: 2021-05-15 19:40:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9ec4d24efadb900bc33c375895e902e4 SHA-1: 872d89d83a2981657d309c09ac2ade2661fc992a SHA-256: 22e9fd29fbbd5e6ee553e6610dcfb1ec25c84670145d4aed1532271f6beb9176
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files hosted on web services. This suggests a link farm or content distribution tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://kuzutuzo.ru/strik?utm_term=itil+v3+vs+v4+certification
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/tuwixime.pdf
    • https://wipasokewuwil.weebly.com/uploads/1/3/4/0/134000036/b8ab2dcba.pdf
    • http://dafesoxexigu.medianewsonline.com/kirkland_9_hearing_aid_app.pdf
    • http://mixezitubut.mygamesonline.org/curso_aprender_a_tocar_guitarra.pdf
    • https://begiruxuvasepi.weebly.com/uploads/1/3/5/3/135351124/2da88af67857f4.pdf
    • https://cdn.sqhk.co/zebenane/iIjgeBX/events_in_downtown_atlanta_next_weekend.pdf
    • http://lulilafemavivog.mygamesonline.org/clinical_pharmacology_made_ridiculously_simple_5th_edition.pdf
    • https://cdn.sqhk.co/puruwedisuma/U2RNghQ/sample_marketing_plan_for_food_truck_business.pdf
    • https://cdn.sqhk.co/telapunojawu/nji9ujf/61158984049.pdf
    • https://ravuripuzi.weebly.com/uploads/1/3/5/9/135958818/tizum.pdf
    • https://xupodidif.weebly.com/uploads/1/3/0/7/130739682/6929943.pdf
    • https://kilixezexixoz.weebly.com/uploads/1/3/1/1/131163494/40e1bb5ae1.pdf
    • https://sivivaleretuvu.weebly.com/uploads/1/3/4/3/134324596/5108296.pdf
    • https://vazonani.weebly.com/uploads/1/3/1/8/131871537/jupuvetolavefon_pivezo.pdf
    • https://cdn.sqhk.co/pefevepufi/rMegfIx/remebuvonetiboxafufa.pdf
    • https://noduxulab.weebly.com/uploads/1/3/4/9/134901810/farajapofejonetal.pdf
    • https://cdn.sqhk.co/govazofaj/8jbGUij/bluff_city_law_cast_episode_2.pdf
    • https://cdn.sqhk.co/kibutonap/hgbogjw/stair_rush_3d_game.pdf
    • https://cdn.sqhk.co/sebutarukaw/diibChi/yandex_browser_alpha.pdf
    • https://cdn.sqhk.co/rivogigaweb/ihhaggd/kenimikeji.pdf
    • http://jojidasusesot.sportsontheweb.net/craftsman_5_hp_chipper_shredder_manual.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/c9292bb8-4c61-458b-9c7d-72449a3e61b2/big_fish_games_apple_store.pdf
    • https://uploads.strikinglycdn.com/files/89de799d-b563-47f4-9bca-5741fe1f2e97/jawowu.pdf
    • https://uploads.strikinglycdn.com/files/fc81b6d6-9594-4630-910f-0740ab319e74/handwriting_without_tears_letter_formation.pdf
    • https://uploads.strikinglycdn.com/files/0ca841fa-1115-4a40-840a-0b22efa61840/bumepovo.pdf
    • http://visugog.myartsonline.com/learning_advanced_ms_excel.pdf
    • https://uploads.strikinglycdn.com/files/ba16dc08-ffd1-4327-aa52-e79275f76c4b/binuzaduwizewevumovidaze.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f4a.bin
2d640b4078526bf4539efaae684b386e69f6c6a188d18256c334e8e6d45b66de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 4912 bytes
font_01_sfnt_off00011ffd.bin
08600238b2156f3662ed779948d6b9eaf75d7bcddf27d1df9c77b7bbc0cb19b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFD 11336 bytes
font_02_sfnt_off000146de.bin
3a87a2a80cb0740ff7ad33dbd9b35031d90241dfccc5ab96a3d2c3133af9c3ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x146DE 16096 bytes
font_03_sfnt_off00015ba8.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA8 4324 bytes

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