Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6910c1db735f33…

MALICIOUS

PDF

86.6 KB Created: 2021-06-30 17:46:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 516ce40ff811a55ef57ff65852cdd7a0 SHA-1: 29e762efdedc819e28fcfc3afaa484d329b8bd09 SHA-256: 0d6910c1db735f33a48a7263489b17a135bcab73ecb2b109e18d549a10d0c73f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning model, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and numerous external links, many pointing to compromised WordPress sites, suggests a phishing or malware distribution scheme. The embedded JavaScript likely serves to initiate the malicious activity, potentially by redirecting the user to malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/1dc0e495cd0640c3edfa9a445c81d7d5/67478717689.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/f05b36d28b49b3c022e4c76244c43289/78399928294.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/46e2665d47d19e673a07980e3960ea15/lozibufidikov.pdf
    • http://drivescuolaguida.it/userfiles/files/sisukotaweleralibalopeva.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/d7vtfeqtkl8lfpmpctktqv9fr0/74549133508.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8568cb84e2eb5f830dc75f7fc0981866/guguvevetomigazosutas.pdf
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/b1ad0251314e36e1f7f06bafd3679416/tizerofu.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f874f4c597---76883228164.pdf
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/97a6aaed2fb285151e6ca618bf7932ab/kufaxanafusol.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/e736ed16078551dd23f2244422cd7fb2/35380517421.pdf
    • http://skup-laptopow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e1180e16b---47456446622.pdf
    • http://skiflogistics.ru/userfiles/file/853688914.pdf
    • http://mundori.com/js/ckfinder/userfiles/files/7953241638.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/58aace78ea7bca5b0237df93e1d6c650/60093703954.pdf
    • https://pezenasenchantee.fr/userfiles/file/puzonisunud.pdf
    • http://nesthomes.in/userfiles/file/xapiwe.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4efdee6c---kexobowugipakixerefera.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160aeeb37ee2dd---99033232361.pdf
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71c9ba362e---97858134556.pdf
    • https://makiriaszto.hu/ckfinder/userfiles/files/88529623576.pdf
    • http://newabel.com/ckfinder/userfiles/files/11690891077.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc6141beec---gofedevenebodode.pdf
    • https://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/7fd2ed138804a5dd80f6d22bf7b399b9/wixujogugiso.pdf
    • https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/4fg8l8d8r9p338a93rp7mejrjg/21483596300.pdf
    • https://terminal.hr/userfiles/file/vigijafogaratodowopajajem.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=narcissistic+triangulation+in+families
    • 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_off0000efbd.bin
e9bb168b6a685ba7f41a4cfb359d718edd7a5d418fb71d5af4c5619923db0937
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFBD 16980 bytes
font_01_sfnt_off00011bf5.bin
6160c10afc009e0f4e9d390f433ab93c6f40dc38a63d1f5cebf639b6c5e52bbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF5 10756 bytes
font_02_sfnt_off000134bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134BC 16792 bytes