Malicious PDF — malware analysis report

Static analysis result for SHA-256 46a2abf824cedfa9…

MALICIOUS

PDF

77.4 KB Created: 2021-07-02 01:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88ea9be670b59e3729c0fd7532c97c5b SHA-1: 3c1b877852b80f853927d0792c77db86c46ccbe7 SHA-256: 46a2abf824cedfa968fe0a1e2d9892197ed48093ed951b0bd55a378d4888ac1a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics indicates an attempt to lead users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://infrive.ru/uplcv?utm_term=electron+gain+enthalpy+of+chalcogens
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/bpqs2diuavv51oralnorc90lcb/titenutudowunu.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071c98495cd7---vasenamurasixunuta.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876c1cebb07---pasetubapevufurag.pdf
    • http://osoboebludo.com/ckfinder/userfiles/files/48416681245.pdf
    • http://yossy.biz/userfiles/file/5294825037.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160982f494de36---mowazazuriver.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607383f812659---31466002690.pdf
    • http://businessvaluationapp.com//fck_files/file/zujoxaxuvunusoropamidufo.pdf
    • http://barudan.hk/UploadFile/file/20210623001759103.pdf
    • http://evpltravel.com/xv_image/file/50155704345.pdf
    • http://universalgroupautos.com/files/others/27782219401.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d364840ee57---gater.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/cj2so2690acdk12u91t9etua35/94599451564.pdf
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609caf66dd18a---jiluzoz.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16082f1e86baa2---14655858532.pdf
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/ohj70lughv8cqq11vbk09rr28m/kusuxujaluva.pdf
    • http://suapaiatuipelehakefamily.com/clients/80707/File/sirujevunimotibuxuvan.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c62f75b43---40431245524.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e707ab09c---298451069.pdf
    • http://minerva-collection.net/files/files/wokipusuwigozaxezev.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0b10b179bb---71949943756.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/01171f63edce470dec6f044e10d7d3e0/48032092179.pdf
    • http://duoctruongxuan.vn/userfiles/image/file/14862222427.pdf
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/126033cabef87815d5c95460d74397a6/sobipuki.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_off0000c990.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC990 16792 bytes
font_01_sfnt_off0000e1a7.bin
ca3c0f1bcd14035ee0f72813dae35bfb8f18135657e6c7e64a354af9bf86c942
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A7 10856 bytes
font_02_sfnt_off0000faac.bin
2aa0e0a2fa89cea3401caaccacd3b3edab7db7a2f300f73052682e9eee97ff93
pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAC 17232 bytes