Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e159a326ca3f31e…

MALICIOUS

PDF

144.5 KB Created: 2021-09-05 06:53:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f5736fc49e2e9a634f7b3d8cdbf5cbf9 SHA-1: b98822c8e4b70734900b32989512bc737812bb8c SHA-256: 5e159a326ca3f31e547c7715fd1fae34c82f184d42aa1dbcd03118c399fa75ea
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for a phishing trojan. The document contains a large number of external URIs and link farms hosted on compromised or disposable domains, indicating an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the PDF and its numerous links suggest it is designed to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

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://oniceh.ru/uplcv?utm_term=hadaya+book+pdf PDF link annotation
    • http://clubesquilacoma.com/uploads/files/87394574422.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/75d87d5b23188e0c4d9a606290216d04/gurujewimur.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/eb945b404249002741b6d05dccb1afb3/rusuvejovirisemu.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/c3ce40c4b2b80ad45490530e5a228de4/molegilenukosomari.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/toworikisibif.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/nevejevemetitow.pdfIn PDF document text
    • http://evola.it/userfiles/files/subixiwog.pdfIn PDF document text
    • http://mictrogiang.com/userfiles/files/nosupolisolexu.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/64193484213.pdfIn PDF document text
    • https://sumangold.net.vn/wp-content/plugins/super-forms/uploads/php/files/212k6nvuc9gfe1nvg7p301lq58/30206728316.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/majutuzujaxewevinenowiged.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611cb1c5b457a---kuwofiwined.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/it2taqp87qd4afpg52dutf3br4/popogetarefibogidujaguna.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/25550121647.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ce95b6f9d---kuvixokep.pdfIn PDF document text
    • http://erex.hu/upload/file/99399068743.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/86fb03a91656045fa6c149ceafaf2c3a/40301575738.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bbc2a9906---kezegitolunigad.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096373a071e8---wirisutezexop.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/32951924651.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff53643638f---8396667360.pdfIn PDF document text
    • http://yuli-china.ru/d/files/pipizezukokenogapakojaw.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/zikidotoleluwaf.pdfIn PDF document text
    • http://keramann.ru/uploads/files/larufowisixe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A957 10088 bytes
SHA-256: 3088c77ea181464fdc6e7dfb828bc854ce9da44cd124fe3b5fefb8197c3819cf
font_01_sfnt_off0001bfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFA3 16248 bytes
SHA-256: e5416874a624cbd45a8b7d2bc7e6e6462e7ed0c339df3634eaaa6db44b29571f
font_02_sfnt_off0001d5b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001edca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EDCA 28048 bytes
SHA-256: 884b5de7a6f7f72939c66b19df4d159e15f032e9703e24c939b1161c2312608b

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