Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8f3f262265b166…

MALICIOUS

PDF

83.6 KB Created: 2021-09-07 18:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eab56705dca3b6f11a7dd014497064a4 SHA-1: 865f41726d1088fd3c85ecaa05a7ab9f669277b4 SHA-256: ff8f3f262265b166b91dff127bc089d756d42fd90541040f9b63fab7ea61db1d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a link farm pointing to multiple compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://pixomot.ru/uplcv?utm_term=ydlidar+x4+development+manual
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c20930c74ac---kemofekigolaviwekojejozox.pdf
    • http://bluekeydigital.com/images/pic/file/58838622526.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16098f5351b313---zarifig.pdf
    • http://delvalle68.com/clients/54584/File/67003304005.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e496d8907f---77845353691.pdf
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160aec56261eb5---96536043365.pdf
    • https://its-bulgaria.bg/files/file/91382728321.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/ebeabc454d400c78f986f5d259b33f55/gesametewuw.pdf
    • http://dspec-car.com/js/upload/files/12320668098.pdf
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/3350521929.pdf
    • http://sten.kr/club/data/userfiles/file/20210726173733.pdf
    • http://odumakus.com/uploads/files/tedanunurejijegilel.pdf
    • http://qbcar.ru/ckfinder/userfiles/files/76688363549.pdf
    • http://execdentalclinic.com/uploads/ckfinder/userfiles/files/24220208898.pdf
    • https://steammining.com/userfiles/file/nisonawixefedex.pdf
    • https://transport-vehicules.fr/userfiles/file/vajagurexuzopa.pdf
    • https://aslplastic.com/ckfinder/userfiles/files/vivolisenuj.pdf
    • https://caribemed.com/userfiles/file/jenunevopavupefinoba.pdf
    • http://saigondome.com/uploads/userfiles/file/jumujemelevofuga.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5211b10ca---45400839574.pdf
    • http://www.asap-recruitment.net/upload/file/11136345878.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/bb8ca8dd394462922228174d3d0673ff/dozamoxabibixozewivabim.pdf
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/5a822551274b7b56b72e56ec79e5ddd0/42691807621.pdf
    • http://medicalproduct.hu/images/files/xiwunomapedutexowawe.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_off0000e047.bin
aa2e6d69a9382096c79acfbbd84d3bf8dfbfbb09ed3c58a318c0cc60f4ed6b8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE047 10716 bytes
font_01_sfnt_off0000f8d9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D9 16792 bytes
font_02_sfnt_off000110eb.bin
ac15c923d5897dc346ccf5fa3991bd039e88f37eec7c3e0569b0f09ad75594e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x110EB 18188 bytes