Malicious PDF — malware analysis report

Static analysis result for SHA-256 465485b09edf1b6e…

MALICIOUS

PDF

86.7 KB Created: 2021-07-07 08:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ed8ec92f36dd5e48aafae49ed8c2df8 SHA-1: aeec87215b0eb4df18a5462688b9a2dbe133aaa9 SHA-256: 465485b09edf1b6e7602eb2a1c2a4541ad44eb78a9d1787c0707631f74159ea2
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate an attempt to lure users into potentially harmful content, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/98aa5741f105d611bd2f39bf9da96573/15220917847.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608dfc2fdd404---torekoruj.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cf1971cb53---politarizuzifos.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/657982a74ae2b5fe2a90cd620d4e69cd/xozujiwo.pdf
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/27aa0cc485e87449e98916271f31f3e3/71010307132.pdf
    • http://www.zywawiara.pl/pliki/87436585524.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16072d083aee13---55220785565.pdf
    • https://atphp.ch/userfiles/file/liweruxofuni.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16089bd61c6abd---mexuzeb.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/4a2bbbda0f088dc6ab1463ef1cc2fad6/33967898942.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/48912639446bd06a52b49ac8e20f8fef/jenod.pdf
    • https://www.ppmcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/vutlok958g5v05582qbsi6b6bp/66295362497.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8377a111e---gifanobevubulitegom.pdf
    • http://www.niziointerior.pl/upload/file/wagekabekijuvoliz.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/hqgpvsff692onhra3p7m12ou9j/wepodunas.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/f7ec7e7356690953c10569e2ba62d969/97653915921.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef5bcb2c92---lujolubukitojevadokowib.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/e68d5c9c33b3350f8de21eb06e1d687f/juperuzipuxibumuwadap.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16096fb77c1d01---24407506291.pdf
    • http://4bx.pl/public/file/parakajakuxijep.pdf
    • http://aj-freight.com/ckfinder/userfiles/files/63933080544.pdf
    • http://ampletrekking.com/userfiles/file/baluviset.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/61a63be024ca160f9e685071b293e56b/30897235226.pdf
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082736ee57ae---nufolijuvexigepuvivu.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=group+of+nerds
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5fb171764b---9169325473.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_off0000efd2.bin
6ab0558913f57df6a7fef2f56a532f6b44d562fc7d2598963cadc4340a5ef29a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD2 17788 bytes
font_01_sfnt_off00011eac.bin
4f4d9a5fe9c04bcc020b0f70cbf1641fc3dc6e8cd8325d2b5f59c03d8078c45a
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EAC 10232 bytes
font_02_sfnt_off000135c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x135C5 16792 bytes