Malicious PDF — malware analysis report

Static analysis result for SHA-256 14a00a866bf5b094…

MALICIOUS

PDF

70.7 KB Created: 2021-03-17 14:12:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bdf89e749b466db7248b38bbf7ed9a8a SHA-1: c5175e35339b223e86541829db696ee00ae3c52b SHA-256: 14a00a866bf5b094449270e92adf74c6f69f6bdb81f14144a051f1f062a3347d
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with a primary focus on a URL associated with a car sale lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a phishing or scam operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=2012+hyundai+sonata+hybrid+sedan+4d+for+sale PDF link annotation
    • https://cdn.sqhk.co/dajebala/geuha7j/gaxelobuzu.pdfIn PDF document text
    • http://roxedizusugu.mywebcommunity.org/3935588723.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/fhhjgGR/wowasurakofukuzopujuwuzoj.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/hbigiib/esic_accident_form_12.pdfIn PDF document text
    • https://cdn.sqhk.co/muzorefu/XvyktjG/screen_rotation_control_iphone_6.pdfIn PDF document text
    • https://cdn.sqhk.co/vefuwebilux/1X2QxI4/37798841335.pdfIn PDF document text
    • https://cdn.sqhk.co/neratimo/fjbkGhj/rc_race_car_track.pdfIn PDF document text
    • http://wefitibugajax.iblogger.org/vg247_game_releases.pdfIn PDF document text
    • http://joxezorov.mywebcommunity.org/exercise_on_subject_verb_agreement_for_class_4.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/lirapepenutavorefelajev.pdfIn PDF document text
    • https://cdn.sqhk.co/xobadata/LhjWjge/nosuvosunidopujodibu.pdfIn PDF document text
    • http://zibepifutidi.sportsontheweb.net/desaropes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6376f8e3-73f7-4292-8a28-d4b5e2b8bfb9/78610500632.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a486f47e-2a6c-4051-8cf8-f727ecdedbd4/how_to_transfer_your_landline_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ce617a5-0a15-4349-9a3b-c97854812b4f/18789673331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba53e4e7-1929-4823-9349-4d342bc5b84e/how_long_do_you_cook_a_half_ham_in_the_oven.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ba4ccfa-33e5-4f9d-a4fa-67c6defd87e8/1904357633.pdfIn PDF document text
    • http://duxegejuw.atwebpages.com/ninimasuwiz.pdfIn PDF document text
    • http://tatepazutapoz.rf.gd/vijedikejuxaduxatolar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cdbe859-cafe-4567-b0c3-f6b53ea347ff/58574219370.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd6b95bd-3f91-40b1-b569-1035686c1fd1/best_way_to_learn_to_code_apps.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa55c5ca-d94b-400a-b27c-c7b7c9144ded/jidumowagokomepevitakol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faa0ba71-47d9-4057-8d1e-1463bf1c2610/powiwedamaxebudamipivezop.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_off0000d5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DC 5556 bytes
SHA-256: 96e64c9380e1b699c593998cc35cfd34b8cff9fd19b14a73e99794f2e2e2fe1e
font_01_sfnt_off0000e8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C3 10676 bytes
SHA-256: 3172a9ec7e6d18250b011901065b35da6ada6171faee350ec8b397e54ac6ac10