Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7c418af06eb2643…

MALICIOUS

PDF

87.8 KB Created: 2021-08-22 02:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 54332fb799f17aebe9082029e1065d70 SHA-1: 5ac4c94ae07e2e509cce686639a69c590d433d04 SHA-256: d7c418af06eb2643a074840757147e04e7904d913e78df32d6e661401239ace7
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://bczenekar.hu/files/file/62490062848.pdf In PDF document text
    • http://sambometal.com/dataroom/file/garunofibedutij.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/8ff527d44edaaee6059f5b42c56ef8a6/jegonademepitawemagosizo.pdfIn PDF document text
    • https://art4you.sk/editor_uploads/system/files/zuburuvurela.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/18def580589c5017b3326dd880c9109e/supewuwet.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/11386849359.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/83461385570.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/zerax.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/6uoaln2j2q7p5tc7qij5lmjto7/21466021036.pdfIn PDF document text
    • https://eternalbliss.net/file/15359732257.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/gezujulinalelu.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c994972ca4---33466182095.pdfIn PDF document text
    • http://gjbbang.com/userData/board/file/bofirimena.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210801_190939.pdfIn PDF document text
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/95512430452.pdfIn PDF document text
    • https://brothers-music.com/ckfinder/userfiles/files/9226519839.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/77ec67525c002f7a93642b8ce0858dad/83865773100.pdfIn PDF document text
    • http://shopexpert.com/app/webroot/files/userfiles/files/saluxa.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b45eaf09d67---89398269993.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c96230a09a5---returabukuvuwa.pdfPDF link annotation
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/o5flpbgfip7kiiqae9f1hfo3c7/dovoz.pdfIn PDF document text
    • https://inverpalmas.com/aym_image/files/goxokiv.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/uk6qbahgaat0ri5qll400udabu/19551263836.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/25385416861.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/98802028804.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=exemple+de+maison+a+construirePDF 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_off0000edf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 19184 bytes
SHA-256: a6e9e4c74d5a1a981b5e7c2ca9872502b2c8552bd8dba42befe103f3c39dbd49
font_01_sfnt_off00011daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAA 10860 bytes
SHA-256: 75e981962a5e0f0788b694a8c82a729c96af485106e31ce2dbd298aa190b199d
font_02_sfnt_off000136b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1