Malicious PDF — malware analysis report

Static analysis result for SHA-256 807a795bd7339db2…

MALICIOUS

PDF

80.1 KB Created: 2021-03-24 02:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 112ddf3da44c65b9c5dca8b85c657405 SHA-1: 7e6e6263f7454bbdad124fa65a5c1b51a44bb76b SHA-256: 807a795bd7339db26cfd0236e7342c739be1c056086f59e367adf2870add2fa4
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to potentially malicious domains, suggesting it functions as a link farm or phishing lure. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a strategy to obscure the true destination by using many disposable hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/award?keyword=bureaucratic+structure+pdf PDF link annotation
    • https://wudegilunukoga.weebly.com/uploads/1/3/1/3/131379548/5834305.pdfIn PDF document text
    • http://startbastar.online/lirikas2ut2u.pdfIn PDF document text
    • http://vinograd.io/495808338410ltf2.pdfIn PDF document text
    • http://kigazuvunawolux.iblogger.org/bogan_video_songs_5starmusiq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467300/normal_5fd1014d69918.pdfIn PDF document text
    • http://erogan-encolumbia.site/mas_colell_microeconomic_theory_table_of_contents7wc0u.pdfIn PDF document text
    • http://smilex.club/62784247827bb91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371020/normal_600d8f272feb4.pdfIn PDF document text
    • http://br1.red/omen_of_the_stars_book_1qhyct.pdfIn PDF document text
    • http://devlp.club/slither._io_hack_apk_androidmwvtn.pdfIn PDF document text
    • http://wwbook.org/extraction_organic_chem_lab_reportcq7ue.pdfIn PDF document text
    • http://greenbike.shop/samsung_blu_ray_stuck_in_boot_loopkpb83.pdfIn PDF document text
    • https://boleturem.weebly.com/uploads/1/3/4/3/134398498/7049572.pdfIn PDF document text
    • http://niwifara.22web.org/ballade_pour_adeline_original.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
    • http://varidigodi.epizy.com/will_turtle_beach_xbox_headset_work_on_ps4.pdfIn PDF document text
    • http://tagozenumuzem.rf.gd/caldeiraria_industrial.pdfIn PDF document text
    • http://kodigejo.rf.gd/arte_classica_grecia.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/blue_cross_provider_manual_california.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/ggps_bokaro_admission_form_for_class_11.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/nervio_facial_funciones.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/74103338075.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_off0000f16a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16A 4832 bytes
SHA-256: c425562dd78dd773e3cb8ae11050dbe545cc93678a484be2a5cca8e85589e0bc
font_01_sfnt_off000101f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 10296 bytes
SHA-256: ba5497e3ab73768d8a29e76906fd823640c76dcaa3e277f917f0a866c0484785
font_02_sfnt_off000124eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124EB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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