Malicious PDF — malware analysis report

Static analysis result for SHA-256 735692970887ec80…

MALICIOUS

PDF

109.4 KB Created: 2021-03-22 22:22:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: b8dc12e69b168632a4cfe7c090db1bc3 SHA-1: bd0fd4a0a52827049befc94836bb886109cec89f SHA-256: 735692970887ec8053184b0635397dcc611393c59e40340732aec691f1dc9560
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal Application Data

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_MFA_LURE' strongly suggests the document is designed to harvest credentials or abuse multi-factor authentication. The embedded URLs, particularly the one on 'golowaki.ru', are likely part of the phishing infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://golowaki.ru/wix?keyword=panasonic+kx-tda50+pt+programming+manual PDF link annotation
    • http://antonio-ita.space/tablas_de_multiplicar_para_imprimir_del_1_al_12szxjm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412895/normal_604863afa0900.pdfIn PDF document text
    • http://floradoma.net/stressed_out_twenty_one_pilots_letra_traducida_al_espaoltecnn.pdfIn PDF document text
    • http://yazansoft.com/juzipoxesazaji8qo4e.pdfIn PDF document text
    • http://medtechnika1.ru/611484592107924m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446925/normal_6047447cb2dbc.pdfIn PDF document text
    • http://myimperfectmomlife.com/89608608398b9nni.pdfIn PDF document text
    • http://ig-copyrightnoticehelp.com/sokariwaxajuraperizonorlf84.pdfIn PDF document text
    • http://garobunatuxovi.scienceontheweb.net/domino_s_pizza_lebanon_menu.pdfIn PDF document text
    • http://winfreeiphone.xyz/25313174197qyqgd.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/although_in_spite_of_exercise.pdfIn PDF document text
    • http://zenaxudoriw.mypressonline.com/6439014998.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/1967e557-4e1c-456f-9625-a4d33a74e144/how_to_identify_grammatical_errors_in_sentences.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a9505b-7461-4a76-97f5-531a4330c595/tascam_cd-rw900_d-in_unlock.pdfIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/journal_of_pediatric_hematology_oncology_case_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6014a237-862f-4eb2-b794-dd80f6568291/gupovovitixiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49324e74-0375-4f05-96c8-9d29a11525bf/24235421621.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae4d8924-950b-4ef2-b60b-948693afd76d/what_is_a_sports_feature_story.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/69506574100.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/xomujoriwajegidebim.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DAA 5824 bytes
SHA-256: 8cc402ad76a0858cfd552b11f709e7b09702e189b88944e334dcde79641f5dae
font_01_sfnt_off00018177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18177 11340 bytes
SHA-256: 0c6070cf5e982dd9c80754c4e921144a5dee65d57e91e559666a5930024c2aa0

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