Malicious PDF — malware analysis report

Static analysis result for SHA-256 6441b62512a27f3b…

MALICIOUS

PDF

85.0 KB Created: 2021-06-01 04:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a8186b2fa94c279b8ff9da4801f5a0b4 SHA-1: c17fda859537aebb763cd49d5362f29fb3b5899b SHA-256: 6441b62512a27f3bf5bf1d698fff98defda3ea5222b5d61b546b55e48e12c28e
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and utilize UTM parameters, suggesting a link farm designed to redirect users. The primary URL, 'https://pixomot.ru/pbw?utm_term=how+do+you+change+the+line+on+a+stihl+fs+56+rc', is likely part of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/pbw?utm_term=how+do+you+change+the+line+on+a+stihl+fs+56+rc PDF link annotation
    • https://mozejoli.weebly.com/uploads/1/3/4/8/134864480/kawamopozape.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488581/normal_605226856d309.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501229/normal_6012409eac2b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493209/normal_5fed7b03dc23b.pdfIn PDF document text
    • https://rotarivinevi.weebly.com/uploads/1/3/4/5/134599250/8372446.pdfIn PDF document text
    • https://lamobivuletopuk.weebly.com/uploads/1/3/4/8/134863798/0ff084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459929/normal_602841a4ec611.pdfIn PDF document text
    • https://rerijore.weebly.com/uploads/1/3/1/8/131856643/f4fab2e3c4e.pdfIn PDF document text
    • https://sakedupepig.weebly.com/uploads/1/3/4/3/134355988/d26a1b6.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://xedidovetaw.pbworks.com/w/file/fetch/144428379/libro_los_hornos_de_hitler_para_leer_en_linea_gratis.pdfIn PDF document text
    • http://viluxese.pbworks.com/w/file/fetch/144428688/razudad.pdfIn PDF document text
    • http://zabodovojif.pbworks.com/w/file/fetch/144426384/futod.pdfIn PDF document text
    • http://papoxuva.pbworks.com/f/jidutiwuzitane.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/w/file/fetch/144427101/16763376020.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/f/94515514913.pdfIn PDF document text
    • http://zilebunod.pbworks.com/f/5136403933.pdfIn PDF document text
    • http://xixokuzujoz.pbworks.com/w/file/fetch/144427233/apex_legends_aimbot_ps4_download.pdfIn PDF document text
    • http://nowefuro.pbworks.com/f/plan_dentrainement_semi_ironman.pdfIn PDF document text
    • http://fulusivijomu.pbworks.com/w/file/fetch/144436389/how_to_make_a_employee_schedule_template.pdfIn PDF document text
    • http://zikupuzajix.pbworks.com/w/file/fetch/144434454/fe_mechanical_review_manual_lindeburg_free_download.pdfIn PDF document text
    • http://kiletejude.pbworks.com/f/mulojukosofoxozuridusup.pdfIn PDF document text
    • http://didaneguk.pbworks.com/w/file/fetch/144429042/how_to_take_cover_off_graco_swing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d765372-e93b-4e67-ac4d-ecf9797a7acc/how_to_clean_rainsoft_brine_tank.pdfIn PDF document text
    • http://wozixokumo.pbworks.com/w/file/fetch/144431763/8225194538.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfc1f37f-2c5f-4d14-9bc9-b19a67d62c36/40540622878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eccec3c-3dde-46fe-b662-4a90f1acc9c3/introduccin_a_la_teora_general_de_sistemas_oscar_johansen_bertoglio_resumen.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_off0000fe30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE30 5600 bytes
SHA-256: 4fc643ad16f84866e03b6b2d30a6b9cc06bd12189d227884648fe55f59fbf0ae
font_01_sfnt_off00011148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11148 11344 bytes
SHA-256: 6dcb0cf5d40361e9f7fa08d4fb5fbb151456d643d32070e77c2e4ef2c9de5397
font_02_sfnt_off000137cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CD 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3