Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ed0bcae401cd0f5…

MALICIOUS

PDF

82.9 KB Created: 2021-09-19 09:50:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 23e4c64d6d9ccb7ee041f08e7ae88308 SHA-1: f4f14d2a5addb8259856e3305deda826d20e0f8d SHA-256: 6ed0bcae401cd0f51bd8a028309b265f13f76e827312c524d6fdfbb562ae4f8c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a lure-based attack. ClamAV detection as 'Pdf.Phishing.Trojan' and a high ML score confirm the malicious nature of the file, likely serving as a dropper or phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=god+of+war+2+android+apk PDF link annotation
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e78c8524b6---24001632862.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bea2b9447f---weboj.pdfIn PDF document text
    • http://mofrantech.com/userfiles/file/18039042057.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133178694cd2---76689078665.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/sulefolevepi.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/vijinatajefi.pdfIn PDF document text
    • http://velo.hu/UserFiles/file/23826311638.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/95442886127.pdfIn PDF document text
    • http://metabolitplus.ru/files/file/25822446529.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/saruluwoxuwudirotigobu.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/popixosebimesivoga.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/55598441017.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/19856494948.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/gudejepowe.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/40399425927.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/8gnarnig8jld75kd23kqbtu3f4/gebazufov.pdfIn PDF document text
    • http://clubselectionvoyages.net/images/file/vafuguxulosujo.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/80367315450.pdfIn PDF document text
    • http://hotelamadeustorino.com/userfiles/files/73228497306.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/21966851047.pdfIn PDF document text
    • https://stpm-sa.com/userfiles/file/51483576933.pdfIn PDF document text
    • https://diphong.com/uploads/rigafebenidowogudi.pdfIn PDF document text
    • http://ser-buk.com/userfiles/file/pexutanavawiw.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/zumaxajavozukosiraririd.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/b612d8a34231f8ad03d6062b29bca57b/85792696087.pdfIn PDF document text
    • http://tabletopad.com/images/file/sosagupotisez.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://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_off0000d62e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62E 21296 bytes
SHA-256: 1dcb0f7800185628632a238765f6c52bb74910888e785e31490da50c13bb6712
font_01_sfnt_off00010e0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E0F 10384 bytes
SHA-256: a023379ffb9292c965599d9a944946e1d41900524006c5674dbcbe6fef7b1f35
font_02_sfnt_off000125ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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