Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d10954384fcbae…

MALICIOUS

PDF

74.3 KB Created: 2021-09-06 00:05:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a0f9bff075ae268c633d6346d6eb454f SHA-1: a1a5a3a3467fbc3aa2a6689c7f7959ca53822e00 SHA-256: 98d10954384fcbae2cc8700b97ec61615ccf58bd229c19a30a1e855a8c333e59
156 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, as indicated by numerous embedded URLs pointing to potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded links are consistent with a link farm designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • 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.
  • 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://infrive.ru/uplcv?utm_term=reconstructing+native+american+population+history+pdf PDF link annotation
    • http://antwerp-reefer-tournament.be/argt/files/sisopelokofiretujigajefix.pdfIn PDF document text
    • https://podimercrm.com/img/files/vetavaronirifelumidawada.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105aac2897ba---fedovixibizibami.pdfIn PDF document text
    • http://beganijewellers.com/ckeditor/ckfinder/userfiles/files/18528091039.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/86000943562.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc6cc94ca5---mazoxabagigoxune.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16119e63e3db78---55918232916.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/vomuturepodotopa.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/givafasozijifepabegobaraj.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/97244274191.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202108210027212795.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a73e1979e6e8c811730307327b3343af/kikekivugumexalepoj.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/dupanotovudokur.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/8435428371.pdfIn PDF document text
    • http://mousike.it/img_ins/files/tisepupuwuw.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/302f4962db24c74acfee370c86c2fbe3/23077649957.pdfIn PDF document text
    • http://psn-monolit.ru/img_file/files/76597346309.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/df1e3f4751c0545fd2de29525891839e/molepavikanurenafovizom.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5547d426de---41474698585.pdfIn PDF document text
    • https://lecapsuledigian.it/file/66552713993.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a7662e3cb---tepov.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/309a7c11b0819c61eb85a7b886151d51/zagapikakemawakitop.pdfIn PDF document text
    • http://picart-personal.pl/fckupload/upload/file/88285435668.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_off0000bccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCD 16960 bytes
SHA-256: bb3caff5e152fb6cce610b41c456091b77d242441f014d82a1406a6da1543ac6
font_01_sfnt_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 11392 bytes
SHA-256: c53c91cfb822b8e870b4bf0e4be5644f8a11b0c7ddab8dda2feba60d473ca80e
font_02_sfnt_off00010315.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10315 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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