Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4dc140f8e291a4…

MALICIOUS

PDF

77.2 KB Created: 2021-05-02 15:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 220578054183e3382268b0151028447e SHA-1: cdb48881d1f2f9316d7a330787fefac3b590b51a SHA-256: 6d4dc140f8e291a484a2f914385c3ac7629ba8a31b3ae8df5f420e0e2a830dc2
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is described as a link farm. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://midufefew.ru/strik?utm_term=farming+simulator+2015+hem+583+z+controls PDF link annotation
    • http://unlockdeals.shop/why_does_my_security_system_keep_beepingrs5qb.pdfIn PDF document text
    • http://fijixedi.22web.org/firefox_60._0._1.pdfIn PDF document text
    • https://cdn.sqhk.co/garoresolif/jhg4lsw/40915660780.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/pPiZnji/example_of_normal_ecg_report.pdfIn PDF document text
    • http://hotloveme.online/821537560181c05y.pdfIn PDF document text
    • http://topstop.site/95808024728vcyhn.pdfIn PDF document text
    • https://cdn.sqhk.co/genedofe/dryiibC/1032779574.pdfIn PDF document text
    • https://cdn.sqhk.co/sawitofi/cwihHRd/mc_bedrock_server_plugins.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tigofed.rf.gd/3859738916.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/best_probability_and_statistics_course.pdfIn PDF document text
    • http://fuginejazupede.rf.gd/ugly_duckling_story.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/xolefofizuvometoveso.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_cb5c8dba698a476b92ec5004398a8f0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/how_to_reset_password_on_vtech_phone.pdfIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_265d6578b26a43d4a959708c21b43cb1.pdf?index=trueIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_feea4989b35c4bf8a75e1c7ef7afb14f.pdf?index=trueIn PDF document text
    • http://galexuduxegi.epizy.com/91842772483.pdfIn PDF document text
    • http://zinipuzotekum.rf.gd/87266149700.pdfIn PDF document text
    • https://a26b494c-4f54-4b9d-aaa3-e02d462d315a.filesusr.com/ugd/c6268f_99ae46ce377e4458b5c58433e624415b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/87998602681.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_d2e6ad35e427455cba82347d47cf30d6.pdf?index=trueIn PDF document text
    • https://76bf09fe-c378-4d6f-baa9-beaf48595a8b.filesusr.com/ugd/61567a_d2d99c0a957b4f26a6b5db6f1e2c8279.pdf?index=trueIn PDF document text
    • https://89e5ed4a-33eb-42a6-b5f1-9fc07ea1e15b.filesusr.com/ugd/ff68bb_6929d9549daf4793b91266fd1e5d00ed.pdf?index=trueIn 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_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 6024 bytes
SHA-256: b86118c0ab560c0e5ca049fcda69ffbf5f419bd295a26be0c64bd1533c5f3c83
font_01_sfnt_off0001008f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1008F 10772 bytes
SHA-256: d23cb362cfd5021b0d7fe17236f2c70779e7067f0f2f9fd2bdd08ff86466b455

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