Malicious PDF — malware analysis report

Static analysis result for SHA-256 13cb47f83bf51f75…

MALICIOUS

PDF

94.6 KB Created: 2021-06-29 16:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 58ca3a900058c41d37f12a6446467cd2 SHA-1: 64935637ba603b5f53255038e50abc4da7ad6f2d SHA-256: 13cb47f83bf51f752600aaea8f419c7ec1b98fdc6e04de14760deb6bf273fc20
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress sites, indicating an attempt to distribute malicious content or conduct phishing. The presence of numerous external URIs and link farm heuristics strongly suggests a malicious intent to redirect users to potentially harmful destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

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://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a64be956b9---pebipamofegudemej.pdf
    • http://lesen-und-schenken.de/userfiles/files/dajerewiv.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d80fabf1344---gozewufasa.pdf
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba6abbf3bc0---83096892393.pdf
    • https://www.hagensmarketing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b543c6e13d9---wakuzunawegonibijana.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/a6ab13cb51bc58b9a000d092d09ba578/34411720151.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab1a5537a4---32147544953.pdf
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/39c25dd207627b435624d8ba46f07538/39406320537.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/cusr61ua9eql5o6ugov1eap0uo/voturowaxolazokidu.pdf
    • http://murito.fr/ckfinder/userfiles/files/66876197155.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/677e64db6bf080a684126731143fd9b3/18546240393.pdf
    • https://apz-arte.com/ckfinder/userfiles/files/todijumakedufuzut.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae9c2f111f---pixovonivenumu.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/33972e9a4ab5907ffb06e13947a3a279/90290845271.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3694f2316---pujudanoniromefuk.pdf
    • http://fontanarosaserigrafia.it/userfiles/file/zoretuzoxaxolafetutu.pdf
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d42bfb0dc39---85772925154.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8a0138b67---wemakela.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/6f628b6ec03fdabdce9c300adfa6c8d7/bivolazaro.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cf51701cf---35009511095.pdf
    • https://audit-advisers.com/userfiles/file/verinejimosakuja.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8a66b08f4---1785410251.pdf
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/uovgabkik8lvr32n0128nqjr2m/41630585261.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=silly+old+man
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e40c.bin
2eb2008681404fbf0020f761390d8361d559fa5974560df170e5030e86486b58		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE40C 3404 bytes
font_01_sfnt_off0000f1a1.bin
7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A1 16312 bytes
font_02_sfnt_off000107a8.bin
35b48d5d78631e4f2e9eb244d66b8e5c33e085399a955237e8a8294d003d1c5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107A8 20920 bytes
font_03_sfnt_off00013c8d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8D 16792 bytes
font_04_sfnt_off000154a4.bin
d0598d6aac019ee7737460098ae71bd6409e01372709efdb604ea949c8f8b201		 pdf-font-stream PDF embedded font (sfnt) at offset 0x154A4 10100 bytes

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