Malicious PDF — malware analysis report

Static analysis result for SHA-256 febd9847efc27a22…

MALICIOUS

PDF

76.2 KB Created: 2021-06-30 10:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9cc25d4c43f9af926e23e3df715de3e4 SHA-1: 2946cebedb5e2d74b989c01608b028e0e4ad33ca SHA-256: febd9847efc27a226126434a17ad325f76ab3cc835215cac0ccb6278e9c713b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript or other exploit vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//75133780525.pdf In PDF document text
    • http://ceskylakros.cz/userfiles/file/74371543910.pdfIn PDF document text
    • http://ilksolar.com/Images/Media/files/29400703376.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/78079913454.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c110e19b6de---67468390754.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c78fb711f6b---foxotasedogufato.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/905cba9e8b52e9cfe8782a20c7c7043d/fewojujefovewu.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c628e1a0f0---56868652307.pdfIn PDF document text
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/ciujdei1ffmg3d5dmar531kg5h/doxut.pdfIn PDF document text
    • https://rajatotogroup1.com/contents//files/runupo.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/ac24fc35bd79288bb7a4c7d2b03e9cf5/13614335323.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/simevibidekek.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a0b87a711426a3c938781000a83bbb26/33064741858.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/c1d5e5224a0fa39c4be3498aa4d75297/sozonotave.pdfIn PDF document text
    • https://hirurgija.me//files/fokuvodunejepazepe.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/17685525715.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/96899758559.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/xemujemexonewamixebotiriw.pdfIn PDF document text
    • http://trustycctv.com/ckfinder/userfiles/files/medinubimegitiw.pdfIn PDF document text
    • http://alhs1973.com/clients/64426/File/16046893033.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/zebejurirevaneripopofiv.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/096cd7dc0e4917cc4395c1b74eb51ae0/87276304628.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/43591256629.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080b2afb7dcd---12634468392.pdfIn PDF document text
    • http://skncn.com/u/files/senexubexotesas.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=example+of+quadratic+equation+by+extracting+square+rootsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DE 16392 bytes
SHA-256: 3abc399e33dc645a188d17ba435cbf006e9cb21fe5ee115bbdf8c9011ea70aae
font_01_sfnt_off0000f05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10873 11548 bytes
SHA-256: 272d51a319174054710a5fc1dd5e1a9d53c1d85b1d2ebd0e2be26b823f148478