Malicious PDF — malware analysis report

Static analysis result for SHA-256 f655195fb4e243a3…

MALICIOUS

PDF

91.0 KB Created: 2021-06-27 06:08:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 3c7bb0a38d5dd72e32e253934b8d3eaa SHA-1: 3e001a4c2f0cbafcb60d1bf1b38aa721a8bda3a6 SHA-256: f655195fb4e243a38de6b9f93a12463c4c60eb8ca28e52596ef257c67ca3a530
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress upload directories and other potentially malicious sites. While no scripts were explicitly extracted, the nature of the link farm suggests it is designed to lead users to phishing or malware distribution sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/1a86d1e6909a09c43a9497b162367f4c/givijugagetaxate.pdf In PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/445de99ee4224a665b221c6b8dfc6ed4/77431976132.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/jubipiwumomamaxuvaw.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/74335595714.pdfIn PDF document text
    • http://huntland.hu/upload/file/53834327998.pdfIn PDF document text
    • http://tbm-mova.by/images_from_html_editor/file/sozoli.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/ruvewomepavometabu.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/d962557b1b8e4831f86755b73d134b37/gazarituxawu.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/keligipopuk.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/73664587363.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160712bd91be91---34876505644.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/penevekabijizekafusela.pdfIn PDF document text
    • http://narcisse.sk/editor_uploads/files/50871493357.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/81781b5cc7c44f56f4a325a80942fc8b/43643102068.pdfIn PDF document text
    • https://airtelco.com/data/users/_/email/files/69091049868.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b008448fa6---kotesipurivuketijiziza.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dacd04bcd---82634220832.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/13516114027.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/8ab61aea8f4f387416df0fd564738b86/mokemitusoresiwuxa.pdfIn PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/95d0e44d5a957c7cbce900081bead0dc/newuganumuworatogegu.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16076836998138---64068407092.pdfIn PDF document text
    • http://ankamet.com/userfiles/file/16271986897.pdfIn PDF document text
    • https://vandolderskb.com/images/usr/xojazexakif.pdfIn PDF document text
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/veguwegovubaputizalulafa.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/97841f25ac75e68d88fd526c104f08d5/togixupavemelebek.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089a6620cf71---67798335948.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=pdf+maker+app+for+moviesPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF67 10568 bytes
SHA-256: b38442d0233cbb5305932799401abd1444ff527ee7472077b55d71d72cc6d2c1
font_01_sfnt_off0001178a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1178A 18040 bytes
SHA-256: 228742eec2ccc33a9236ec9da7c56fd58a990b0f537a70d3d1d26f822af7103b
font_02_sfnt_off000146bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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