Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0599729b10ac80…

MALICIOUS

PDF

71.8 KB Created: 2021-04-01 14:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 453344ceeb63f77214f7a1c2efb6cdd9 SHA-1: 233856c9504a8ee5e46b577bf9649a8bf76931c6 SHA-256: 2e0599729b10ac80d00d2785a5381178f30ed36da446d9459391252418e0a803
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 maliciousness. It contains numerous embedded URLs pointing to disposable hosting and link farms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a non-clustered link farm on disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://vilenefex.ru/award?keyword=a+policy+on+geometric+design+of+highways+and+streets+pdf PDF link annotation
    • http://zatoboyvibor.fun/rane_62_driverjp36z.pdfIn PDF document text
    • https://powumebaporisav.weebly.com/uploads/1/3/4/8/134891471/8262258.pdfIn PDF document text
    • http://sibixujuw.22web.org/kamevopor.pdfIn PDF document text
    • https://cdn.sqhk.co/wikikifigas/ihACnxH/remakerozevezatusugoni.pdfIn PDF document text
    • https://cdn.sqhk.co/nazalugewu/e6t2jfV/todo_math_review.pdfIn PDF document text
    • https://wurixexaf.weebly.com/uploads/1/3/4/8/134865586/bitinurupaki-kemusi-xofusowavaralo.pdfIn PDF document text
    • https://cdn.sqhk.co/nojebimit/bfsji2O/52522281286.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378834/normal_60652e1d3d425.pdfIn PDF document text
    • http://copyrightsupporthelpcenter.com/96763267942md2ve.pdfIn PDF document text
    • https://debugifepini.weebly.com/uploads/1/3/1/0/131070476/36ce0d29331c.pdfIn PDF document text
    • http://romeita.fun/205228232471erag.pdfIn PDF document text
    • https://tenemetit.weebly.com/uploads/1/3/2/6/132696414/melasosejukowope.pdfIn PDF document text
    • https://cdn.sqhk.co/xidafigutoxa/Hjikmt8/pevujukub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476007/normal_601b64e84ac67.pdfIn PDF document text
    • https://ravemazezaj.weebly.com/uploads/1/3/4/8/134885195/e116ae9cf5c9f7.pdfIn PDF document text
    • http://instgramcopyrightdispute.com/bujukozabasuvokelirm2wfh.pdfIn PDF document text
    • https://cdn.sqhk.co/muvenetu/fOZUE3r/red_buttons_never_got_a_dinner_quotes.pdfIn PDF document text
    • http://gratoramaa.website/calcular_mascara_de_subredsmrp1.pdfIn PDF document text
    • http://kabonuwumew.66ghz.com/how_big_is_a_large_side_at_boston_market.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugibujupedo.rf.gd/23307141372.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/kajunamosebi.pdfIn PDF document text
    • http://xefosilevono.epizy.com/the_alienist_season_3_release_date.pdfIn PDF document text
    • http://kegipufi.rf.gd/67527176366.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/2010_forester_xt_towing_capacity.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_off0000d893.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD893 5752 bytes
SHA-256: 75f2987640d8e1c62a4574a00e276c4395f9e645fb21cbb248943c579cf9bd55
font_01_sfnt_off0000ec13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC13 10876 bytes
SHA-256: 88e6f35bef1984259f5181876693d159a83ea1d0996b26a2720782a67b658776