Malicious PDF — malware analysis report

Static analysis result for SHA-256 9035149c99f87043…

MALICIOUS

PDF

75.1 KB Created: 2021-04-02 01:30:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ec949dfa07e3b9587ad082d68ee52600 SHA-1: 98c1f76ef0a2ca4bdc791bc9ac03b615087c965c SHA-256: 9035149c99f87043dee4372e06155b8acded591878b1b59ab7ed4f653ed20ae0
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://jacksth.ru/wix?keyword=holt+bien+dit+french+3+workbook+answers PDF link annotation
    • http://viruxego.mygamesonline.org/october_1st_week_current_affairs_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/sisadenev/fif4gc4/35198214684.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/dGhahaY/space_engineers_bigger_planets_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/vVigieU/93292684480.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/kirufejowigikavasanu.pdfIn PDF document text
    • http://vizojuzoninunoz.scienceontheweb.net/witcher_season_2_release_date_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/p5AVFii/auto_gangster_download.pdfIn PDF document text
    • http://dabinepoj.mygamesonline.org/steelseries_arctis_7_manual.pdfIn PDF document text
    • http://befotuke.mywebcommunity.org/70443961032.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3465328d-eb21-4af5-a94e-b8fdacefaafa.filesusr.com/ugd/c63bf9_cef7463978c64875a562b1ee3efda9e4.pdf?index=trueIn PDF document text
    • http://gegilifopom.myartsonline.com/86592140476.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e15f996-3afd-4538-bbb5-cf29a29f307d/rerum_novarum_encyclical_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/life_together_fellowship_app.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/broadsheet_south_melbourne_cafes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9659e70f-8233-4aa6-aeb0-76f9557ef04f/pals_menu_rogersville_tn.pdfIn PDF document text
    • http://vujapoguxesak.myartsonline.com/what_types_of_intermolecular_forces_are_present_in_ammonia.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/how_many_carbs_are_in_dunkin_donuts_donut_holes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58cfdb69-a15e-40a7-9a38-252f16ecf12e/what_order_should_i_watch_sword_art.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/96647234798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb7402ad-1036-4184-9644-58f5983a6892/dream_meaning_pregnant_girl.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/jilodeduwolavakanadesum.pdfIn PDF document text
    • http://mozutulobiris.onlinewebshop.net/bujilekalojibonemi.pdfIn PDF document text
    • https://a208a2de-cee2-48c2-86e3-c620a022946d.filesusr.com/ugd/dda32d_127da96de67042c08dd37b07a300e67b.pdf?index=trueIn 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_off0000e4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 5532 bytes
SHA-256: 9be47b50a16bcfeb4630b1a2e0284da023a88098196a4541904c8c659fcb3a15
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 11328 bytes
SHA-256: b5d355ed5c8e186910e92255a6545e09e977a272df81372d184de1241806b6f4