Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5749c3cd0b5168…

MALICIOUS

PDF

75.8 KB Created: 2021-04-07 02:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5891494abdd6d1e4a815ba8815b1ebc8 SHA-1: c46f4ae1108dd088ed6d4d03fb770b0803402b78 SHA-256: ed5749c3cd0b5168a57545c9e387e9d55e550000dc3e0f5d0815ba2dbd227244
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs point to potentially malicious content, and the document body, though garbled, contains a search query related to eating disorders, which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=que+es+un+trastorno+alimenticio+pdf PDF link annotation
    • http://lesantyqas.online/how_to_find_local_min_and_max_calculus0l4dg.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/1888757.pdfIn PDF document text
    • http://kukushpa.fun/26782105680zdofe.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/gihbaxF/littlest_pet_shop_your_world_hack_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408335/normal_5fec21f13795c.pdfIn PDF document text
    • http://wacc-cat.org/22263329330b275h.pdfIn PDF document text
    • https://luwimaxilonava.weebly.com/uploads/1/3/4/7/134772317/voxuza.pdfIn PDF document text
    • http://goldenframecollision.com/calmato_alpha_40_sportnzb5o.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/fghhcv0/panofo.pdfIn PDF document text
    • https://dogerisu.weebly.com/uploads/1/3/0/8/130874322/9169995.pdfIn PDF document text
    • http://help-copyrighteamservice.com/how_to_pair_motorola_bluetooth_hk2557emr7.pdfIn PDF document text
    • https://biwozatilajatem.weebly.com/uploads/1/3/4/6/134636438/basafizaxotulid.pdfIn PDF document text
    • https://noruwapawufibem.weebly.com/uploads/1/3/0/9/130969999/wigobosi_sipodup_bekoperosokig_fexofiso.pdfIn PDF document text
    • http://yogist.fun/bainite_phase_transformationx0u1p.pdfIn PDF document text
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/vekuwuzanikita.pdfIn PDF document text
    • http://artrosil.xyz/nebitiggee2f.pdfIn PDF document text
    • https://gapuropiti.weebly.com/uploads/1/3/2/7/132740804/6302709.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393779/normal_5ff001fbb80c3.pdfIn PDF document text
    • http://pl50off.info/will_grand_theft_auto_5_be_on_ps5fygc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379487/normal_605316d6e87f7.pdfIn PDF document text
    • https://tapoduxumusuna.weebly.com/uploads/1/3/4/7/134733142/3966192.pdfIn PDF document text
    • https://malojedatev.weebly.com/uploads/1/3/0/8/130813840/812e52a.pdfIn PDF document text
    • http://help-verification.com/dyson_dc39_partswejke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ea0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA0D 5360 bytes
SHA-256: d7a4ae0a5ae320abad2631c78727b492a82bd000c1a2a91b1b722c38276ef32f
font_01_sfnt_off0000fc2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2F 11024 bytes
SHA-256: 5d68d8195cc0e9b90e5c4939084d2a8d37501b6e6e06b6e35982488219f39768