Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2d5a2d6a3a1d60…

MALICIOUS

PDF

70.1 KB Created: 2021-09-27 01:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 46ac4fb95c22374edf2d947a9b3445a0 SHA-1: 858ce12d4f9a0a1473a30e7ae3ffb0b4679559bb SHA-256: 3f2d5a2d6a3a1d601d89a012938e6491ae4c9033e7bdf2b3ab97de50d83cdd5b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The embedded JavaScript stream and numerous external links, many hosted on compromised CMS uploads, suggest an attempt to redirect users to download malicious content or phish for information. The presence of a link farm on disposable hosting further supports a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=download+omnitrix+simulator+mod+apk PDF link annotation
    • http://ccsctda.com/ckfinder/userfiles/files/20210919_110919.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/8582350723.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/4q0h2gcggb5bjrsp0ubmp8kjfr/kijimijuxijevab.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/161303f192aabb---dapozazuwutugefukibadimo.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/68308678660.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/sejivaj.pdfIn PDF document text
    • http://www.leposeur.fr/site/upload/ckfinder/files/lasedabadudebepesinasaxok.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/4b88634e83dadfd3363d243e2b736ccf/55880079908.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/sorifikak.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/63327804183.pdfIn PDF document text
    • https://tch.lu/files/files/72202546190.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/waxusosedipuno.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/35892848122.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/julobosuxeluzeziwajunir.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/91476748206.pdfIn PDF document text
    • http://erex.hu/upload/file/69827184347.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/jupojefezekofo.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/17022447269.pdfIn PDF document text
    • http://yourmoneyyourbank.com/uploads/File/78263842467.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210904_8FD9383F3F5A8AA3.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/lsah83gjtbgq0p719aai31uk39/57875764338.pdfIn PDF document text
    • http://china-zub.ru/userfiles/file/33920071343.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614d3a0519920---rebotu.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_off0000b060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB060 10804 bytes
SHA-256: 362f40d18d2d7d8d668844979e41ed1a55479a03aaea12e6c45c75368f4e3f50
font_01_sfnt_off0000c943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC943 16300 bytes
SHA-256: af906fc38bb9b2a6d2485ad733ccc55b34d5c030af2e17225d247d7275360b14
font_02_sfnt_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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