Malicious PDF — malware analysis report

Static analysis result for SHA-256 374ac1cf86ba8b06…

MALICIOUS

PDF

66.9 KB Created: 2021-06-10 12:25:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b21cd2281d458ff2bed970b5a24928d1 SHA-1: 0b38106839b1110f77873b7263a999b48489fc66 SHA-256: 374ac1cf86ba8b06cf89d35778a3690e0dd62141c2aaaf99d9d04c5ba7dc71b1
156 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It functions as a link farm, directing users to compromised WordPress sites hosting further malicious PDFs, disguised as movie download links. The primary attack vector appears to be social engineering, tricking users into downloading and executing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pistant.ru/uplcv?utm_term=twilight+breaking+dawn+part+1+full+movie+123movies PDF link annotation
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef7518d8c5---76050989397.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b57dbaa337f---14130929307.pdfIn PDF document text
    • https://armagedonspedycja.pl/files/file/15715806439.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3526b1438---87074024600.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/631c40d04dfc1136f138f3a33045cf06/80791248137.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1ed406337---95150429799.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/2cv8a2c6dlgqne26n4tkf55744/nagodekitile.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/37200746576.pdfIn PDF document text
    • http://mousike.it/img_ins/files/67550293615.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/walodevesamoduxojipip.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/fimakojigofivadalonovekoz.pdfIn PDF document text
    • http://computergramm.com/userfiles/file/11117912119.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1fbd58bbb1---xeredovif.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/38854842645.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160761e399c85d---60064418140.pdfIn PDF document text
    • http://darec.sk/files/files/63768114888.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_off0000c698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC698 6108 bytes
SHA-256: c66590ed25affe9f644300b0b47dfb0ac6499cf2430d1ac5ad8b5c66797b0df6
font_01_sfnt_off0000db51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB51 10476 bytes
SHA-256: f81d047c5719bf2bf4bca60954e1f2230f3af1c73ca78ce0c024b80e02a46c37

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