Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3193e58a906a9f…

MALICIOUS

PDF

84.6 KB Created: 2021-09-04 01:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5cdda431a81e03e8522b77ce2353180d SHA-1: 8817552738a0ae6c03aa29db7f08c3d516bd0f8a SHA-256: fe3193e58a906a9f77a38b48ad50eeecb137565e4db9ce7c94905b9e58f8781a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or malware distribution lure. The document functions as a link farm, with numerous embedded URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. The primary attack pattern involves directing users to potentially malicious external sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://ewt.cz/res/file/nujovuwiwidexisibatik.pdf In PDF document text
    • http://fitviewer.de/files/file/niviruzipale.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/6680747242.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/ebd74309a01ad243a8dbed479b889f56/buzusanozubogis.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/laxozexegejiwimesasu.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/7c9d2df270920ef5bb7dbe76225a9f3c/siwidobit.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/96803defa649ccc38606c056c312311e/9688376622.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3dfa6d2a0fb038fe1bb5f17ac392e50d/27907174101.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/0f5e204a2fe121226c94ae675d30a734/83025371590.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/e7d67198c6fa2b8c9caf795ad46db607/33301382583.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/9450cdad1283c8f1eb780d63cebfa458/72292450651.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/7d17b2f4a5afb0f00393491903a74c03/77683083265.pdfIn PDF document text
    • http://learningkey.org/userfiles/77574114302.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/wuved.pdfIn PDF document text
    • http://landroverbh.com/ckfinder/userfiles/files/61333296942.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/5135701986093c52bd8649.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/kiruri.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/pojasewigalorakuxuj.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c1ee3dd5756---61477233168.pdfIn PDF document text
    • http://ewinghighclassof1963.com/clients/e/e4/e4cb61fc1babc639533983e887b7272d/File/divuwugasa.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/c55e2f9cf97b9d9e4698202a6149126d/vepetajixizowosawege.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/28944055590.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d1a3559901e---novasijamabozuvawavukab.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/xikulujezewerilozodopen.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/lshgh0e7hug5sep98a38in6018/jufevebusaxifudovodawarig.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7738010fab2a66f982c117b85d5b674c/roxewukimibusowalejupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=recipe+book+free+download+pdfPDF link annotation
    • 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE605 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1C 10708 bytes
SHA-256: 48cea78c2a230b6719dc89af2a6042900c03d7cdef5c8cf34380554bafd54b0c
font_02_sfnt_off0001169a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1169A 17932 bytes
SHA-256: fc38d30328838c9105fe0a8dce3bcde630e33a954708b8f53d54abcbaceff795

Open this report in the interactive analyzer, or submit your own file for analysis.