Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ca06b68977ed98…

MALICIOUS

PDF

86.1 KB Created: 2021-07-15 19:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f31326b4c2207b6ecc54b17793b80f1d SHA-1: 501e9de1ba16c0ea28379df93faa135def538f6f SHA-256: d0ca06b68977ed987d2d25d0976be102d9cd34d36168d305edf7d80047efe812
184 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery via these links. The presence of embedded JavaScript suggests it may be used to further obfuscate or directly facilitate the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=all+things+grammar+past+continuous
    • http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/sorepeb.pdf
    • http://osteriailgalloelinnamorata.com/userfiles/files/25214987591.pdf
    • https://ckmusicdesign.nluserfiles/file/606915665.pdf
    • http://jakpaisanestate.com/images/upload/files/99668514198.pdf
    • https://atl-50.com/files/file/43334852587.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/0gm443h6rvor8l3arp65h9175r/81714513819.pdf
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/443329sd2n04spf5o4n290p8dm/78353767124.pdf
    • https://rockoncharters.net/home/rock/public_html/ckfinder/userfiles/files/88218110596.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/aa64fac4dd11cd0699273e487eb62098/18248583186.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160917616c775c---78612042283.pdf
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9fa23541b---vososijisufoke.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/90316364466b06d09ef92019cc8b47c1/857903252.pdf
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160d23fcb8a808---fozuvopanezivoga.pdf
    • http://costanzolegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/3031954943.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaae9f75aeb---mirinazez.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/0e5ff37827b72b6565c161043bf7a3c9/31579560098.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c953f077d7f---bugoruwavitibakidafarat.pdf
    • http://shqinze.net/admin/upimg/file///xajukunagaxariloxokuxemi.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/lnda0cjdusdcokgvk0bfiuqpkt/zovubopowemege.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15fe915072---57840472408.pdf
    • http://pogservice.ru/userfiles/file/73710134792.pdf
    • http://project-lovcen.me/userfiles/file/lefawogilipijarodilepin.pdf
    • https://irrisyst.eu/files/file/tereme.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b6f6675df---87842343027.pdf
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/xamopafonobufovafi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee90.bin
2c768415ab40c7249fec19c172eb080be203b0828185c71fcf217e14a78b200e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE90 16864 bytes
font_01_sfnt_off00011a5e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5E 16792 bytes
font_02_sfnt_off00013275.bin
c42c5e1982b1ac6e737ae4ab01ef6ef61e72c0e19ce1e612d5661de442cb3088
pdf-font-stream PDF embedded font (sfnt) at offset 0x13275 10768 bytes