Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a204d296b123202…

MALICIOUS

PDF

81.8 KB Created: 2021-04-05 12:16:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f7f562f96f979ec918262a35a469de6c SHA-1: 789d2275568ff5f6a63a1ff160059e9822bb9d69 SHA-256: 5a204d296b1232029a93adfc62e293349db6dce1137e70c6c855f7a024bd214b
126 Risk Score

Malware Insights

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

The PDF file contains numerous external URIs, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/award?keyword=encyclop%25C3%25A9die+catholique+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471235/normal_5fcaa54914c65.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/nugoropetar-neduteporupije.pdfIn PDF document text
    • https://cdn.sqhk.co/dodiniwotud/UndY12h/juxufaporusenapovovapal.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379848/normal_5fec861991360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401505/normal_606a10b278c0f.pdfIn PDF document text
    • https://tiseparalav.weebly.com/uploads/1/3/4/7/134735838/90cfc8b1.pdfIn PDF document text
    • http://timecodes.net/synthesis_essay_introduction_sample3bbap.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/ijcKgee/celestial_seasonings_green_tea_decaf.pdfIn PDF document text
    • http://shtancircul.site/70020945638j9uky.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462993/normal_5ff0f6bd3d678.pdfIn PDF document text
    • https://cdn.sqhk.co/dowivita/nQRegdy/rikotewugapotovikan.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/k2ghhcM/53465512048.pdfIn PDF document text
    • http://povulofi.mywebcommunity.org/68788516051.pdfIn PDF document text
    • https://cdn.sqhk.co/berirenike/93rNhb6/31853695840.pdfIn PDF document text
    • https://tolajugim.weebly.com/uploads/1/3/4/6/134647220/6313998.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498994/normal_5ff1ef0ab4db4.pdfIn PDF document text
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/xuviv.pdfIn PDF document text
    • http://microdigitalmeter.xyz/vevuruwoln3fib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bidejepeko.onlinewebshop.net/rujurojagoludo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c89dd0e-4727-44ce-ab72-233cdbe2d600/accredited_online_anatomy_and_physiology_2_course_with_lab.pdfIn PDF document text
    • http://zedofaxuboz.onlinewebshop.net/penikibevetigeji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29463d80-c75f-4a07-9da1-2ed83ecfd753/insinkerator_garbage_disposal_dimensions.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CC 5296 bytes
SHA-256: 71a4c444f4cd01ab7ed1e577c3ace1d29ca8cf5ff1fddb6336fcb1f75ddb96e3
font_01_sfnt_off0000f89c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89C 12804 bytes
SHA-256: 27d3e2d15283267f32c110845653e51efa47098b70aff1bd0ed83371df99b837
font_02_sfnt_off0001227b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1227B 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e