Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2a43b08ea62302…

MALICIOUS

PDF

83.6 KB Created: 2021-04-25 18:47:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 6b311e4457ae3f99017f4c5d048f77f8 SHA-1: 274be8eeb9622e281e685e865edf6939f6a34b2f SHA-256: 8b2a43b08ea623026a834a255d8219e2f81f9298db2c75094b46100bd8a93368
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The heuristic 'SE_PAYMENT_REDIRECT_LURE' strongly suggests the document's content is designed to trick users into believing there are changes to payment instructions. The presence of numerous external URLs, many hosted on disposable domains, further supports a phishing or redirection scheme.

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://nipisod.ru/strik?utm_term=statistical+machine+learning+in+risk+management PDF link annotation
    • http://firstflirts.site/chemistry_an_atoms-focused_approach_3rd_edition_free8t8rl.pdfIn PDF document text
    • http://b2b-servis.ru/asus_rt-ac66u_review_2020bwcsz.pdfIn PDF document text
    • https://rexizoxulod.weebly.com/uploads/1/3/5/3/135399206/gesiretas-xakipaw-xasolokejazupe-motigulul.pdfIn PDF document text
    • http://tifoxikutawe.sportsontheweb.net/fegaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_600903bd8c6aa.pdfIn PDF document text
    • http://betmoy57.com/cules_son_los_frutos_del_espritu_santo_segn_la_bibliagktiw.pdfIn PDF document text
    • https://pawonojureva.weebly.com/uploads/1/3/4/5/134522231/teris.pdfIn PDF document text
    • http://center-about.com/24171752276tnqrh.pdfIn PDF document text
    • https://rajotabew.weebly.com/uploads/1/3/4/3/134360909/wiluzewemapu.pdfIn PDF document text
    • http://kebuwakuje.medianewsonline.com/vuvoniwam.pdfIn PDF document text
    • https://tukuboxux.weebly.com/uploads/1/3/4/5/134510407/405544.pdfIn PDF document text
    • http://refarebadas.22web.org/laradevija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366646/normal_5fd6810eeb82d.pdfIn PDF document text
    • http://luxibenuguk.getenjoyment.net/29583956460.pdfIn PDF document text
    • http://potisomo.22web.org/bitukivalupamosexap.pdfIn PDF document text
    • https://muwewixobajigu.weebly.com/uploads/1/3/4/3/134312624/zigew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/bfec81fd-93ea-4be2-aff4-816f52745a4d/37819711015.pdfIn PDF document text
    • http://zeteximezoxa.myartsonline.com/xozof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82f28b4-1509-4811-87c6-3d4a597d235a/zasuwiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1b3486-ff8e-4ae5-a848-c2cb45c7d628/clasificacion_de_los_titulos_de_credito_por_su_forma_de_circulacion.pdfIn PDF document text
    • http://dopexatatadad.epizy.com/welcome_speech_for_teachers_day_by_students.pdfIn PDF document text
    • http://nurarodavokowe.epizy.com/principles_of_ecotourism_planning.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45445c69-6cde-4433-b158-0150eb7c1084/what_do_you_need_to_bring_to_get_your_permit_in_sc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE0 5060 bytes
SHA-256: e8f741a5dfa6866ec0e7d0cbfc85a3af97cc0082c06c09225a494dde3271cdb9
font_01_sfnt_off00010ccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CCC 11364 bytes
SHA-256: 6aafe22f66ed2ee8a9bf58ffb77b316d137ac7338113719a590abeed62abbb7e
font_02_sfnt_off000132ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AC 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361