Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e5158393fdb091…

MALICIOUS

PDF

83.5 KB Created: 2021-06-25 13:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97200c39dc62e0a6d623efa42cd437ff SHA-1: 926ca04a3615587a81f46658e6769d9668476ce2 SHA-256: f2e5158393fdb091774ecae6899f23d7675c286323760b5c7f3373a2cd7a373c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://garglob.ru/uplcv?utm_term=solution+annealing+stainless+steel
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/07eeac9664e7585907bfeebb283c6c4b/jofisorilofebunikukonad.pdf
    • http://mai-colle.jp/userfiles/file/podivozexaxebem.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdd1dd3da2---59913323914.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b30b06f5cb---29986563304.pdf
    • http://grandp.ru/userfiles/file/zirebilabekamupekazori.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6b67379fe0---25198953112.pdf
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa20c2c87ad---31352443192.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/6h24nsdkdlfmm47gsjags0rfuk/97138032129.pdf
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/db2170df42db1223652d4d8b58ede63a/82472176715.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/29305ad17c4e591b983487106effdb1f/fukavalamanelavedogabori.pdf
    • http://henrycrawfordreunion.com/clients/1/19/1929e20d1ffebcad6d8b2a659e9c170d/File/14946999605.pdf
    • https://craftsmancuttingdies.com/wp-content/plugins/super-forms/uploads/php/files/c02037fd95997abefbf79d27153e269f/70545961159.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bc9c8f9fe---tawugutozujoken.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/iqv6mqv6ff330a4lmk6l61pdto/48471224689.pdf
    • http://yoron.net/up/files/82322279831.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_off0000e63a.bin
264e5c470546f34d871a906d71330e61b61dfae0a884e5c70e7ca020240a6a3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE63A 16696 bytes
font_01_sfnt_off000111a3.bin
294916146f3b546a1b3e6e56b6154231af24f1c066ab5744defad6066f7d2280		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111A3 10356 bytes
font_02_sfnt_off00012925.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12925 16792 bytes

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