Malicious PDF — malware analysis report

Static analysis result for SHA-256 adec58299537b72e…

MALICIOUS

PDF

84.1 KB Created: 2021-09-01 22:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 48a4084771d0372943c71bb121a5d388 SHA-1: d83c024dd1d70a5b736377485aa9d0032fb10da9 SHA-256: adec58299537b72ee7768462db34e2535c9e04da6f677b51b17be51da9a6b401
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs that point to compromised websites or disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. No scripts were extracted, but the extensive use of external links and the nature of the heuristics strongly suggest a phishing or malware delivery vector.

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://chcial.ru/uplcv?utm_term=what+does+blue+want+to+build PDF link annotation
    • http://kibbkw.com/uploads/file/90516864433.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/3tjdd7s8c4mflnktol0mlh1sk7/26566102180.pdfIn PDF document text
    • https://olterus.org/contents//files/36434562748.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5cb559ebdce4b77a5d5c421ead559729/23637382173.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/wesijopijek.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/e00ac2344fc343f84855fb90d6edff28/92344871483.pdfIn PDF document text
    • https://cobaltinc.org/userfiles/file/84859544655.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161191ac250e5b---gedizegowifupewiv.pdfIn PDF document text
    • https://aventura-agence.lu/userfiles/files/12243176132.pdfIn PDF document text
    • http://czechdidgeridoo.com/admin/upload/file/gefegakivuvod.pdfIn PDF document text
    • https://fivetc.net/uploads/files/jekoga.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/d2sqj9rvuf44fjci6phj1uh0ur/77341381890.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/zufamogisilakix.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098a53f84750---44512994695.pdfIn PDF document text
    • https://tonycustomtailoring.com/nbloom/fckuploads/file/20689719213.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/dazejijinovewajexufofu.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/l2qjla3v85sg7vkt4ekjiprp5j/berefozilumefizov.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1612936391dd72---78399506840.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/267345244f359d1c226952ec300c017b/17177075168.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab193585602---simefagam.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/99543827668.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/6a676b800dd1e583d02800bf19cc1024/bolinaru.pdfIn PDF document text
    • http://aviatechinform.ru/sadm_files/37411500200.pdfIn PDF document text
    • https://wagaskar.com/media/80924656934.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_off0000e2f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F3 10564 bytes
SHA-256: 8f1ad5cd8bffc067eb489ffc6984b31ac75678699340a5bb9addba5a1f34a881
font_01_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11316 18028 bytes
SHA-256: baae428108767468c659199fa93e00a8ef4cc7c9a0931712d5e5fda47766ffa5

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