Malicious PDF — malware analysis report

Static analysis result for SHA-256 47aab691906d300b…

MALICIOUS

PDF

102.4 KB Created: 2021-07-03 00:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d3b2e80a555d9476062abc3bc76897a SHA-1: 5bc01e0de6a64556c3219d25e23f3def1c8b1b55 SHA-256: 47aab691906d300b46c7cdd1587e9fa6a1fca68c2b5dec14b8126aa1943f2c9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as a distribution mechanism for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9896

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://wastran.ru/uplcv?utm_term=the+most+high+in+hebrew
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/288851d0b5e546396de32eceb2a0a6ce/50956099319.pdf
    • http://dochoiotovn.com/uploads/userfiles/file/92640278756.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/idi46rts0hcr7ena2k08kkrld9/29205810646.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc813914275---19201783505.pdf
    • https://vieclambaohiem24h.com/upload/files/7855474864.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075df470c362---gokow.pdf
    • http://af.ssla.ru/images/fornews/files/poveboruvezeweko.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160703ba82c27d---fonanakadarune.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16084551d18625---88954645520.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608afb23ec9e8---gokomividavorapepiwadez.pdf
    • http://paroissedementon.fr/upload/files/wazaxetepen.pdf
    • https://usssecuritate.ro/userfiles/file/5892573977.pdf
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160903b2c50bf4---71966754413.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b63b8f99c59---79456736156.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/3874f810ca31d2944880041e42732de5/wilizowifotok.pdf
    • http://petukmahaaaraj.com/userfiles/file/pezavuvagijanajaletif.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8eb48c665---papufiluvovi.pdf
    • http://krossinkeuka.org/clients/c/c6/c64aa726effa6776341672ea469011e7/File/sogakozaluwurefu.pdf
    • http://lifemartrealestateconnect.com/wp-content/plugins/super-forms/uploads/php/files/l39fb1047issakc29svb0vlmf0/59030110894.pdf
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe9eef196d---17162304353.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/c5935218318b61a5ad35ffd477f4dd7e/pobatemodukejes.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/72093012757.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/fda7996f26150401507bdd43ef8f17ae/zilozakimidipilewoku.pdf
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/9902e2d448c8ae23d62e43c694a9df96/20923344629.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100e6.bin
f4db4eb691a34287c8c6d1fa58f412923e929d6d81664fc09de27456e7d6ec27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100E6 22812 bytes
font_01_sfnt_off00013982.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13982 16792 bytes
font_02_sfnt_off00015199.bin
09d4597ad71804b0b2baaf83fe675a2fb9bfb4661a0a2fbaa929e7be5dd12c53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15199 10536 bytes
font_03_sfnt_off00016975.bin
a87e5d52e8176cea240f70afdb58a6321bbcb462a1f3dc74ddb86a84fab78485		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16975 19368 bytes

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