Malicious PDF — malware analysis report

Static analysis result for SHA-256 562278039839c482…

MALICIOUS

PDF

87.2 KB Created: 2021-08-15 18:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 37ffdb832bfc280a3588468b5bba0a50 SHA-1: f845b5125d408b23892d6cb6e11f7dca758c0ef7 SHA-256: 562278039839c482e3428dfed2e73fdc57245d2bd838740240b59c0b661340c3
244 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ML classifiers and ClamAV as malicious. It contains embedded JavaScript and numerous external URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malware. The document also includes heuristics indicating it's a lure for password-protected archives and remote support tools, commonly used to bypass security controls and trick users into executing malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 9

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://chcial.ru/uplcv?utm_term=sony+vegas+pro+17+crack+64+bit+download+free PDF link annotation
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/rm16pspafatr51ooang6s09rv3/wapifinovi.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/baratasu.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/woket.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/e436qqprq8m1b8ngbglpvic99d/50283592575.pdfIn PDF document text
    • https://resonanceacteurs.nl/userfiles/file/37885611054.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1610761cd3658a---20928115538.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/33962199900.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16076317adf5e4---658992775.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/ade05d84086129e29933701870cb4474/58238611844.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/30708883729.pdfIn PDF document text
    • http://dlt-nkp.com/fileupload//file/83013499821.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/a6jto4m8fgii54flm53n4tueg2/wizigifuxiz.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/5df7cf5e687a640088208a3440be2ac5/zupaguwoxigitabikabo.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e859aad5667---neguvijopizuzawe.pdfIn PDF document text
    • http://longthinhphat.net/uploads/files/vapagisipafilab.pdfIn PDF document text
    • http://brukbet.com/user_images/file/zuvileramituxalusaruwiri.pdfIn PDF document text
    • http://epmachine.ru/d/files/nekem.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/i41t61hs5tac0ns3s6dse3ito2/49209731148.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/mokuvas.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/54ced48e031db54bdff1b2b2be704023/22051781400.pdfIn PDF document text
    • http://brainerdhs71.com/clients/0/08/084bd9d902c6a1e3ee48703551c87841/File/mamomulisesomej.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/fadafebirulunetomuvafed.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/gunuronudujugafasetej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010286.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10286 11716 bytes
SHA-256: 9eef046bc66e7f20576588c90db45f4cd74300a1a761ba32b88eedb52daa8b5f
font_02_sfnt_off00011e63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E63 18224 bytes
SHA-256: ab7b3a7dc6d97812d858f0aeff772f0535dc971301707a48884c2ee672ebd9de

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