Malicious PDF — malware analysis report

Static analysis result for SHA-256 2600c7cc95d94e2c…

MALICIOUS

PDF

56.8 KB Created: 2021-09-07 21:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6464628b42dd5769d1bbc6131d6d4ec8 SHA-1: 21d9f366093e35b983c48e19d37ad4da1fe114e3 SHA-256: 2600c7cc95d94e2cb7ea401107a22193817eb71aef4860c098d815557a5a1c00
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to compromised WordPress sites. These links likely serve as a link farm to direct users to phishing or malware distribution sites. The ClamAV detection and ML classifier further support its malicious nature, indicating it's a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8578

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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
  • 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://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b920687595---xakegemulujofemoxus.pdf In PDF document text
    • https://dichvuketoanvn.org/uploads/files/9041400876.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/mis36gl2u583ibqkhnsrtcm64g/87837322402.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/vufubevonanozo.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f05bccac36---dumida.pdfIn PDF document text
    • http://michellesmithscott.com/clients/36670/File/12683961626.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/toworusilefasem.pdfIn PDF document text
    • http://www.prctech-th.com/ckfinder/userfiles/files/49259794155.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7a66de766dd6db37bea972b12e82c04b/80832670241.pdfIn PDF document text
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/sutisotidogeb.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160be8bc581425---gamukupixedalonojuxagib.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b78f8bc21a9---84138010732.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/86011631256.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/93538655053.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/60109472207.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/mosawoku.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e3c160cbe4f3ce99cb809c89a0c6c11b/235485965.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/cd2da40dd0ff34b9955431fa43447500/5147050880.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835fc18436d---wesifazebuvivixubifajesap.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bad822e649d---85494635333.pdfIn PDF document text
    • http://biogenetec.tw/image/files/20210820_024827.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/sulixobivewut.pdfIn PDF document text
    • http://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/33026037671.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=architecture+manual+presentation+sheetsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC6A 15456 bytes
SHA-256: 27cee84e3db7278ee47d28258e65e5b92222a1dd49e0517e0f45876da5bbad19

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