Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f1c5941ba56e8e7…

MALICIOUS

PDF

82.8 KB Created: 2021-05-12 20:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: fd089af99de3685f6cd8637ae3dcdfc4 SHA-1: 95d89bd2ea5dafdc2faafe214764b728fea57199 SHA-256: 8f1c5941ba56e8e7c95d455bb7db60227a869805087370596bfa70dda74cdf57
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning model and ClamAV, indicating malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, with one prominent external URI pointing to 'https://ponafet.ru/strik'. This indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=altec+lansing+life+jacket+jolt+mount PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465707/normal_6032a5a7dfa49.pdfIn PDF document text
    • http://sputnews.com/kolevakasorfiy0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385648/normal_600efd82d6d2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466366/normal_604166ee16bd1.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/49419865397.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452852/normal_6012e26178e07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484097/normal_6056d79edd75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474470/normal_605b8e588b428.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5ffaaba8592ae.pdfIn PDF document text
    • http://tb-films.ru/kgf_chapter_1_movie_theme_songq68pq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426059/normal_602be6698f811.pdfIn PDF document text
    • http://fasoxuxesatilu.sportsontheweb.net/soxepiwikuvebefawiton.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/50712390713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd4cbfdf-33c9-4000-88d5-49697e3403b2/simulacro_de_evacuacion_en_empresas.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/29306824311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3930be88-0303-4903-bbe1-45c6b2f44c50/first_30_60_90_days_on_the_job.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/rupeweporeno.pdfIn PDF document text
    • http://jojulupijawide.onlinewebshop.net/la_bella_durmiente_cuento_original_hermanos_grimm.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/bsf_new_bharti_online_form.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5787aa7-8f15-4944-b133-40d19b505799/xodizipedonejufife.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/african_queen_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10507b58-495c-4cfa-bdf4-c74591c9a0ef/do_all_atoms_combine_to_form_compounds.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_off00010516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10516 5232 bytes
SHA-256: 46f1f3052fefe98b1ff787256c019dc3f66dae2dadce4822fa6a64d8aac484a0
font_01_sfnt_off000116e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E8 11540 bytes
SHA-256: c179cd8f6f240c50e9841c46479c3c4d497d6bca9e1848afae8389fcb400f116

Open this report in the interactive analyzer, or submit your own file for analysis.