Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbcb595f0b72066f…

MALICIOUS

PDF

76.0 KB Created: 2021-05-24 13:15:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bb0b2998ab82f066a362d5e58443d086 SHA-1: af21c9657ed3ee2d52f51d8b82e6a76f26fb2a7a SHA-256: bbcb595f0b72066fb6ab8cf1de74efa665c9eca01a9be01dc8fc56ecdd777800
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, suggesting a malicious intent to manipulate search engine rankings or redirect users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious content, specifically a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lead users to potentially harmful external resources.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://dugedepap.ru/strik?utm_term=how+to+pair+two+heyday+speakers+together PDF link annotation
    • https://vuvonuzomuvi.weebly.com/uploads/1/3/4/5/134508102/a30ca95b144bd8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411252/normal_604d670a7f520.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425926/normal_60437c6261a7f.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/kivokebaverom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470553/normal_6032a5b8a7af0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450240/normal_605998c64fc20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425501/normal_6061ea03395fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402486/normal_603a7870b9748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458837/normal_5fd922093f0d1.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/2600bc29-ba50-47ae-a4c8-f10fbd804355/81115198237.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/carson_dellosa_clip_art_shapes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee764b56-7a16-4b71-a86d-e023cf0f0e22/american_gods_season_2_episode_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/civil_wedding_ceremony_booklet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/lofazamopawutusefuzesural.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e885bd-a215-489f-b030-7a6b8e17690d/50th_law_of_power_audiobook_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/tesapibebujep/bubej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7e39ba7-4e64-429c-8440-300cc67aa55d/what_genre_is_the_rangers_apprentice_series.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/history_of_taj_mahal_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41b44b8-232d-4a9b-a726-1fd648b4ef93/windows_keyboard_shortcuts.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/how_to_do_system_restore_windows_xp_command_prompt.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/bin_sachivalay_paper_solution.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_off0000e81c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81C 5408 bytes
SHA-256: 6b717a556788b5b9401f4d540e4b70f76a4c4e43040eee8163f2cedfd471ff90
font_01_sfnt_off0000fa95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA95 11224 bytes
SHA-256: 904328efda6ff17759e12cff54ba9fd04d378e79558ef160dadbe6d83d760546

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