Malicious PDF — malware analysis report

Static analysis result for SHA-256 e000c12edcdd710f…

MALICIOUS

PDF

81.5 KB Created: 2021-09-19 21:50:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e05ec853014f4ad714e7d0482dcb16e4 SHA-1: 6f5f4c3c300770186be6237afcb27d5dbd89b18c SHA-256: e000c12edcdd710f45e1e4e854bb03a05fc7b42e6a2a9a7eb3d7df77bcf16a04
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains a link farm with numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The presence of 'utm_term' parameters in some URLs suggests a phishing or spam campaign aimed at driving traffic to specific content. No scripts were extracted, but the overall structure and URL distribution indicate a malicious intent to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://crewmak.ru/uplcv?utm_term=mcpe+ios+shaders PDF link annotation
    • http://abc-tel.ru/data/File/juxilesuponirana.pdfIn PDF document text
    • https://www.comperat-89.fr/ckfinder/userfiles/files/73335889071.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd665ac29d---weditokomemuwiwagonemopex.pdfIn PDF document text
    • http://virtualcharityevents.com/vce_cake/files/files/vasugu.pdfIn PDF document text
    • http://sigmabhp.pl/userfiles/file/59605629550.pdfIn PDF document text
    • http://i-physiology.ru/upload/ligepipudipozujepojizule.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/76c47f8af22ac281854d14cc2cbc1d1f/fogirazavigezisu.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/41590151369.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/32125503145.pdfIn PDF document text
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/xedebazun.pdfIn PDF document text
    • https://jancsoalapitvany.hu/ckfinder/userfiles/files/84860640454.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161311648ab5d4---51912718650.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/34537625966.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16136e9604b87a---xivazexabujutavini.pdfIn PDF document text
    • http://sieuthibds.net/images/files/gikevozomerifavagepulupon.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/55968673646.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161344e2d522da---nigixenavi.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae798b2985---78950855265.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/91271fd56a44afe922ce56951b46ceeb/30985161499.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/fiwizofowilozeduxu.pdfIn PDF document text
    • https://brakos.it/file/1748964026.pdfIn PDF document text
    • https://thefertilizerproductionline.com/d/files/wenevazesidijiki.pdfIn PDF document text
    • http://agavietnam.com/img/files/zokebelisaronuzegavusaz.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_off0000dc23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f435.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF435 17224 bytes
SHA-256: a21dde8350cf661ecafa61d4ec8ecb90e43d4466e3c2c316772e81dee52e4d64
font_02_sfnt_off00012105.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12105 10356 bytes
SHA-256: 18dbaa231d34ae25638d0f196b3a3a1f092598251d2fd1d4d2b6419ef9570013

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