Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5cb46ab8e376cb4…

MALICIOUS

PDF

106.1 KB Created: 2021-06-29 17:18:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 659f17f777239325aa629363c994548b SHA-1: b8c33f1c9043c680d9de25197c3bffed403e6405 SHA-256: e5cb46ab8e376cb4ab535eb7d8628b0a0f73a99dbdad3653c1bcebe6e7ad9861
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs that point to compromised WordPress sites and other domains, suggesting a link farm designed to redirect users to malicious content. The presence of these URLs indicates an attempt to distribute malware or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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=prostate+cancer+spread+to+liver+life+expectancy
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a43caa7b8ed---nizojozogujakopuba.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/de502a771ef51116b206fb96df990abc/visibizobiregaguzomigek.pdf
    • http://gancza.pl/userfiles/file/rajixofirowaraxipirepu.pdf
    • https://computerzone.pk/file/lusefutixu.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/91a116d6a37f4ca0bd3293e7c03e94e2/34809985582.pdf
    • http://mea-travel.pl/userfiles/file/3089376143.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f9e482f06---sexototapetebo.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/26f1f1e3e914bbb119ad6a3086b8d397/tixebazi.pdf
    • https://gtselect.fr/ckfinder/userfiles/files/wuwifomodideb.pdf
    • http://ghemassagenhatban.vn/Images_upload/files/xuvifakokawenetusoduwixix.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/71ci2ghu3sohd8jsanh154abt0/pimedunixadowuwutupefeb.pdf
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f2b912a8---tosofik.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097483c633d3---83201561462.pdf
    • http://www.bash.cl/media/file/62351688163.pdf
    • http://bloomx.com/sites/all/sites/bloomx.com/files/xiwedariliwebupawidobofas.pdf
    • http://nsfeed.com/_UploadFile/Images/file/52797195225.pdf
    • http://npxbyy.com/wang3_3_10_27/Upload/Upload/file/202167958302844.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/c487a24463169e774644d21230fa1cd1/jasanogizufijotu.pdf
    • https://veaodaibrahma.com/uploads/image/files/65871587938.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/6bf1ce61bed63d60da242de4cfe65d65/gabekunarawudixaliji.pdf
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/37580d3ilud6dsvpeqkhp613la/domobafubobusugupisufo.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e67878378---zumidutomamemobar.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c66ec8a68e3---gijobumafenemonij.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fdb4c1377---42437924598.pdf
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/7ebcb28f3935e14fb34f85a86c038b6d/73546847837.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/84cb5af05468a254f01aa1a373c35949/57137234282.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/df06f375877124a411688b3a0978b677/nawuvemikinesulireni.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013d42.bin
0ec10ae230c52939ee7a5fdad1382908d0af615f722474a38809216d3bff394a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13D42 10896 bytes
font_01_sfnt_off000156ad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156AD 16792 bytes
font_02_sfnt_off00016ebf.bin
b1ab3bfaac8683afbf405df64d4532af410f31504f5a0693444fae8acd6b84e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16EBF 16852 bytes

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