Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be05191207ecb9e…

MALICIOUS

PDF

70.4 KB Created: 2021-09-07 09:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 29aa7cba0944b997d91745446e2faa6c SHA-1: 1ddead5caa980479d1e03f20f9a480131d102ffd SHA-256: 1be05191207ecb9e8b23995d1b6de51b55a573bfe1aecda724b9866055e2f79b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The embedded content, though heavily obfuscated, likely facilitates redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pistant.ru/uplcv?utm_term=2014+cadillac+cts+v+manual PDF link annotation
    • https://museos.comarcadelasierradealbarracin.es/ckfinder/userfiles/files/kududalalodoganule.pdfIn PDF document text
    • http://horlickhigh61.com/clients/a/ab/ab3fb267cc30d45b98f460a20cee0b8d/File/84923188321.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/xobamokaziva.pdfIn PDF document text
    • https://aydin-elektrik.com/resimler/files/39635025260.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/85a9e0e127d38ca72cb2b6367a14b80c/52669839676.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/95858478674.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ad29ee80c33---fesesejifus.pdfIn PDF document text
    • http://dolphinkorea.com/files/files/ravapefabekuwelofitod.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/dd8472c695921f1607537772e5beeaef/nadujemafesakotisovajege.pdfIn PDF document text
    • http://kwong-cheong.com/userfiles/62862877437.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/g1l76bakdf44sqar2kltheu6po/78541903982.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/b57137f5e3e1813a41494af904865fe4/99504188248.pdfIn PDF document text
    • http://suseefinance.com/userfiles/file/75372126594.pdfIn PDF document text
    • http://letdentalab.com/img/files/jamedirewijovebitikesowu.pdfIn PDF document text
    • https://dcimx.com/files/zorolelevupivurozewazo.pdfIn PDF document text
    • https://silky.ae/images/bulk_images/files/59489280791.pdfIn PDF document text
    • https://elperrocallejero.info/ckfinder/files/13657383994.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/9ec4b1f4c338b38c8d07498ed8d204b7/20358976163.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e49a99bdb---77049019408.pdfIn PDF document text
    • http://gemaeldeundobjekte.de/uploads/files/sekemexazutojemun.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/mowigesuxada.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097df4f56c57---xomukasulagaziguguzoge.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/9638844267.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_off0000b4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4F3 10620 bytes
SHA-256: ff6468756d770588b0e08be86487305c3546c6bd03c0131d46850fed8e8c2eb9
font_01_sfnt_off0000cd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD55 15584 bytes
SHA-256: 9761a9585a02e5e5dd94128234a3fcd7463da43edadd7f896a1c193d6d4d0270
font_02_sfnt_off0000f3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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