Malicious PDF — malware analysis report

Static analysis result for SHA-256 faea90a73ec14101…

MALICIOUS

PDF

89.1 KB Created: 2021-06-30 11:59:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 77939b8c232cce282b603d6d02c795d9 SHA-1: 3e37e1e342accdfd34b463bd13c3d6b249d8bc96 SHA-256: faea90a73ec14101ef221c23addeebab98ad904f1704c89b701d6fe7ecdd44d6
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to compromised WordPress sites. The presence of numerous links hosted on various domains, many of which are associated with form upload vulnerabilities, suggests an attempt to distribute malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072994bbaa87---81430159159.pdf
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc8bb5043c---44815622210.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/p3qobnt2c25gs14npmvikd6sjj/wogodurufewiboxutazek.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/fls5iugil4d9mr0bvq2g7e0fjk/jiwuwipenivivixupu.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afdb6050995---zukezoxupeputizoz.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607069fccb7e8---wuzanomexewewuj.pdf
    • http://hutergroup.de/userfiles/file/41834553848.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089556c3ff02---nakoposudoxibekex.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e74611778a24e94e2fdf95170df2e67d/59934578585.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebb94b7b16---71692518206.pdf
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/fe914062874eb75c18b19a47ef30f77b/80332453890.pdf
    • http://piazzademarini3ge.com/userfiles/files/kivijaresaxixowet.pdf
    • http://english-life.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160722f15befd1---95677317200.pdf
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/4643390ef334b15146a47f13de082174/72702979941.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160c126d005bba---tupupelujedub.pdf
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e0383a1830---48772134393.pdf
    • http://dancingstarsgreenwich.net/clients/1/10/10f73e4104fe6082999c9b722aa65ba2/File/22291428261.pdf
    • http://ndt-tl.ru/upload/file/14605309766.pdf
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d0833ea4c---70282949925.pdf
    • http://rentbucharest.net/images/userfiles/suvidega.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/8374700eed51a52abd11bf1ac4f59e61/xajetoriki.pdf
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/rclrbfepbm3ms6leteajurn0k1/jumurojenulapivo.pdf
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdfe9a4346---52942977205.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+battle+is+not+mine+but+the+lord%27s
    • 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_off0000fa13.bin
8ad54e3a1c0ee6f902315566f2ecd9482fa71ff18aeacdb1a84b74c67bf542fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 17140 bytes
font_01_sfnt_off0001267c.bin
26d3f8eae37d408310a4512b3010774fd98126b3ad42a287880485e8e5915cc7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1267C 10752 bytes
font_02_sfnt_off00013f01.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13F01 16792 bytes

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