Malicious PDF — malware analysis report

Static analysis result for SHA-256 2147677de12b195c…

MALICIOUS

PDF

85.7 KB Created: 2021-06-06 14:28:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ff519a40dff82e260d1e5b37ab8622c6 SHA-1: cbbe18ac34db5b1c210d91edeb3b6223b3b6bd7a SHA-256: 2147677de12b195c3de4198884ed663c08f401158bfe0323098a22060359fa83
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://catamma.ru/pbw?utm_term=us+citizenship+test+questions+and+answers+in+gujarati+for+free PDF link annotation
    • https://zezojafoxivofed.weebly.com/uploads/1/3/4/5/134528913/cdcc0a778.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414332/normal_5fd08a89a2fc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414495/normal_604752120ab7c.pdfIn PDF document text
    • https://donixefafara.weebly.com/uploads/1/3/4/3/134310569/dorunagafifivexo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466679/normal_5fee43018b278.pdfIn PDF document text
    • https://sogazefod.weebly.com/uploads/1/3/4/0/134000298/2048573.pdfIn PDF document text
    • https://zubosevofugojat.weebly.com/uploads/1/3/4/3/134307347/dexutidezor_lazuruwab_kezukumev_ribugesalatuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_60524a0a0b891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448094/normal_5fd301213d08a.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/ffd7e5cf-35d5-4d16-ae17-b5c8b8f8355b/54283347702.pdfIn PDF document text
    • http://dobifapig.pbworks.com/w/file/fetch/144634215/how_to_make_rice_in_farberware_pressure_cooker.pdfIn PDF document text
    • http://siseraxoru.pbworks.com/w/file/fetch/144498609/not_that_meaning_in_urdu.pdfIn PDF document text
    • http://finebov.pbworks.com/w/file/fetch/144449355/diffusion_stem_case_gizmo_answer_key.pdfIn PDF document text
    • http://wusagem.pbworks.com/w/file/fetch/144439599/how_to_clean_my_airpods_pro.pdfIn PDF document text
    • http://nimulivupale.pbworks.com/f/76383204965.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87113ce2-e4b2-45db-94a3-0bdf3a8d16d7/carl_rogers_humanistic_theory_of_personality_ppt.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144445074/35083726230.pdfIn PDF document text
    • http://tarogifere.pbworks.com/f/positive_words_that_start_with_ne.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b1d674c-1228-4ac8-b991-4be92a5f0894/ode_to_aphrodite_original.pdfIn PDF document text
    • http://xifilipisi.pbworks.com/w/file/fetch/144413298/nogemomelemogipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06a3c6b-8d03-48c2-aad9-46e72baccf59/ruger_mini_14_ranch_rifle_ammunition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69987589-870f-4f64-ad51-b82b4cf9a013/lezovutesavelupokuku.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/14612677950.pdfIn PDF document text
    • http://muxopal.pbworks.com/w/file/fetch/144471561/how_to_get_dank_memer.pdfIn PDF document text
    • http://xifatarege.pbworks.com/f/jubatawugazowadapetobovuw.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_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 5604 bytes
SHA-256: f53d3e7a0914d95341fbd925e63ad3397ebb958b577c3b0c41fe0f21bf22bcbc
font_01_sfnt_off0001162f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1162F 10640 bytes
SHA-256: c99ccda7359f1c97fdca9efe85b04b9b3786ccb4b0336eaf8819a701ecbbcb74
font_02_sfnt_off00013aac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAC 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f