Malicious PDF — malware analysis report

Static analysis result for SHA-256 29f9865696b603bb…

MALICIOUS

PDF

83.8 KB Created: 2021-08-24 22:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 7432d2f4aefc0a68b5a516c532a9d6e1 SHA-1: b0cc63b6ee1c19a20093d9b7deec9df9b33a9dab SHA-256: 29f9865696b603bb40704b4646154ea2fb62c6421d445fcd92d3b3360a16ad0e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://cructi.ru/uplcv?utm_term=what+level+does+geodude+evolve+pokemon+quest PDF link annotation
    • http://nova-auto.com/upload/62883108156.pdfIn PDF document text
    • https://grupo-kayros.com/userfiles/file/jejilodupip.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/94pbabhphnrp9gb4m469lb8hd2/lixapujidupadijafo.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ovva2jchi541prh0dbuo1v26e5/nikexodimujomof.pdfIn PDF document text
    • http://fandimnarodaku.cz/upload/file/lipukuvuwonobowokegaro.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/ganupovojavipo.pdfIn PDF document text
    • http://bielwod.com/userfiles/file/99548936478.pdfIn PDF document text
    • https://atlantidegattico.it/file/80553263348.pdfIn PDF document text
    • http://xn--2vxr09c6mc.tw/CKEdit/upload/files/96343947921.pdfIn PDF document text
    • http://www.hausbaumesse.at/ckfinder/userfiles/files/juzajinavuzubav.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/rugamikokub.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075caf9b2110---97211358403.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/19962050220.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a80d17f0d1a---89519779187.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/25948846599.pdfIn PDF document text
    • https://hbfilm.ca/resimler/files/15741933587.pdfIn PDF document text
    • http://devitohomesorlando.com/userfiles/files/jotojitupede.pdfIn PDF document text
    • http://veterani-pushkino.ru/userfiles/files/runerojexaxikeg.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb92f54fed---92514048419.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c69d73eab47---tazolevovijomexe.pdfIn PDF document text
    • http://cuiquji.net/d/files/58217725671.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/89056439183.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/7a3aa419224cf8657c940a89390f62eb/pabufimop.pdfIn PDF document text
    • http://emannsltd.com/userfiles/lotanajukitov.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/kasezirirevowatalagibedus.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_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 11044 bytes
SHA-256: 142e9bd5e2b8891c15e2f17aeed160b51ef7fc45c429c91a068488f9167fc013
font_01_sfnt_off0000fc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000114a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114A4 16272 bytes
SHA-256: 9f5f712e529619156dbe0e0480d6ce8946a430b8ff983973971affa25e50487f

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