Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f4061b3920da604…

MALICIOUS

PDF

77.3 KB Created: 2021-03-20 22:03:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: a9393744c512d6b3bbc3b6aac90c969f SHA-1: a68e816a863aa9097f3239a863ab59a5c59af962 SHA-256: 6f4061b3920da604b34e90358c7755d6dbe28cb729c8bf38530513c89ed040a7
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 and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs pointing to external domains, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the idea that the document is part of a link farm designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://seumenha.ru/wix?keyword=charlie+brown+christmas+worksheets+pdf PDF link annotation
    • https://cdn.sqhk.co/derepinejabi/bihAid7/preppers_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458633/normal_600c7e1d0276d.pdfIn PDF document text
    • http://mupifojoxur.medianewsonline.com/17993573564.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413977/normal_600a93ef9c02d.pdfIn PDF document text
    • http://sodaapp.pro/what_shows_are_available_on_netflix_usa5ol8d.pdfIn PDF document text
    • http://korogesubelokut.mypressonline.com/annabel_lee_summary_edgar_allan_poe.pdfIn PDF document text
    • http://notdull-eng.online/narodezufek5fsjh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479474/normal_6050ee8f2a38e.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/3685017.pdfIn PDF document text
    • http://naturalgood.space/gaguwawa3hm92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486742/normal_603150bab38b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499319/normal_60275dc44f8ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403406/normal_600414bba5a72.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/jaihrVm/teachers_salary_in_florida.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496151/normal_5ff6599d1125f.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/2007_honda_rebel_250_horsepower.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/hjbyzje/lock_screen_stitch_aesthetic_wallpaper.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449183/normal_5fdb8c30a0a14.pdfIn PDF document text
    • https://terulupi.weebly.com/uploads/1/3/1/4/131406892/d37ca280.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448733/normal_6018694033f09.pdfIn PDF document text
    • http://ver-alex.website/iowa_code_704.6txsnn.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_5fe03ac15e347.pdfIn PDF document text
    • https://kotuvowomikek.weebly.com/uploads/1/3/4/3/134370123/xululanolus-makok-taben-subigenizodokib.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/self_meditation_barbara_ann_kipfer.pdfIn PDF document text
    • http://tulomodev.getenjoyment.net/jabuzobukoferinijelo.pdfIn PDF document text
    • http://supportcopyright.net/57646512302hgvbd.pdfIn PDF document text
    • https://japatuxivavagax.weebly.com/uploads/1/3/0/7/130775167/e52ebbcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://www.dailymotion.com/video/x5575icIn 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_off0000edad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAD 5596 bytes
SHA-256: c0f6e220683803071238a9744b3b8d89cc5d75e2192ba1bfa9d5af23ed653c4d
font_01_sfnt_off00010094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10094 11368 bytes
SHA-256: 93a1890317cc9958c4d0c3a64803cc034e9fc285f29a2818150c8cff4f8b748f