Malicious PDF — malware analysis report

Static analysis result for SHA-256 150d2409264f43aa…

MALICIOUS

PDF

83.0 KB Created: 2021-06-28 10:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4c4df360739da030d2ad036e09e81398 SHA-1: 63b6131c8c4da8e7ca7404f3a5fe258bac1b7080 SHA-256: 150d2409264f43aa2482a02880afccfb35b2f7bff07a025c838e019ac412b2c0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lead users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://crewmak.ru/uplcv?utm_term=a+trip+with+your+wife
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160991d5ec9941---84495275746.pdf
    • http://2ds-creations.fr/userfiles/file/pixunetisefedaritun.pdf
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080994315c80---wudafesupam.pdf
    • http://dagmar-e.de/userfiles/file/73423600878.pdf
    • http://slsnn.ru/content/files/58956522778.pdf
    • http://balone.net/_upload/file///19318390789.pdf
    • http://autoset66.ru/admin/ckfinder/userfiles/files/96660329682.pdf
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/7351727814e7f033e50738106dfa6d05/ledaterimo.pdf
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079a5b4343d8---wezusukaw.pdf
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/3aa2fe2e75ba45e3e0496854003ec178/kuxovoroxokasokamo.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160afbfef3ca00---95702903632.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/62cb7f758f42f984df47faf9e4db6ba6/motonawidubixinubixuja.pdf
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160d06265e96a2---87690335082.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/a99ae8594ebc3b766c4f6fd9e6c42cc1/dekubimidewosinokafe.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/c74a045771d415f4d773ba6c8dcb2967/widodewaxeruzusewatide.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/0749051430fca77031e147380be9bdb2/25476113750.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606d15e5a49e4---25757515173.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090e94832265---fizaguzopinuzeluxixu.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7c297a98d---fokonafigunabisup.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/34gpsocqm1hd2h1daj40nn9v0r/nawowul.pdf
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/57635ea53ad557b88f328047dd029e74/sitifudelavixuxasibu.pdf
    • http://kleinschaden.expert/userfiles/file/vazunu.pdf
    • https://majorsagilekvaros.hu/uploads/file/80870218339.pdf
    • http://kapsalonvogue.nl/files/file/70839429588.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_off0000e25d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 16792 bytes
font_01_sfnt_off0000fa74.bin
eb41ef09d351186e0d84c72434fe9eebf64b907dcc0b09e80b36083eb36f31ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 10256 bytes
font_02_sfnt_off000111bb.bin
35bfe385db43c43be477b3e6968d422864b23f0728061d204ba150a14a344040
pdf-font-stream PDF embedded font (sfnt) at offset 0x111BB 17324 bytes