Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fa0017a606198b0…

MALICIOUS

PDF

307.6 KB Created: 2021-07-02 10:02:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5833f5cdddb22942010aecf63aa23171 SHA-1: b1bb0301be3531adc5a521c011bea81a15f4a320 SHA-256: 5fa0017a606198b04ecadfa43650f7e81e4ff9e3a653ac0895d5897c606bf6ae
126 Risk Score

Malware Insights

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

The PDF document contains multiple links pointing to compromised WordPress sites, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates a pattern of using compromised sites for hosting malicious content. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9724

Heuristics 5

  • 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.
  • 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://huntic.ru/uplcv?utm_term=app+that+makes+you+look+older+and+younger
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3b27d7bae---sinabi.pdf
    • http://szwygs.com/upload/95323549253.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/0d090928cb18d0763c7078dcc0c0f412/kifevogi.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcbf603a9a---rutuvoxufumu.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a32f538c9bf---84341693088.pdf
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/f3417bae87f014cb173df4cef18605d7/solebid.pdf
    • http://selfmadefilms.nl/userfiles/files/wezinubitupasexorapefepaf.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce613a5521---77188225714.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cae8fd3f251---kiwufifinulidowarotodujef.pdf
    • http://phatnang.com/media/ftp/file/62563842199.pdf
    • http://assushop.com/userfiles/assushop.com/file/32372156983.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/46cb16ea1349077777f297e0c8a4b4dc/49606647845.pdf
    • http://webinside.pl/userfiles/file/90634149919.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abecd8d96cc---begapidubazu.pdf
    • http://zrdb-drogbud.pl/Upload/file/18123044683.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609a5bdded524---49600847072.pdf
    • http://anhuizhkj.com/upload_fck/file/2021-6-20/20210620194644349319.pdf
    • http://dailyliving.nl/ckfinder/userfiles/files/xitafuzusiva.pdf
    • http://wowbond.com/upload/Fckeditor/file/sodumogivibe.pdf
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1609d402cc6eee---popikixefizuluwezupajaro.pdf
    • http://driver-jazda.pl/upload/file/vepumalemiserujoli.pdf
    • http://ash-graphy.com/userfiles/file/25413246314.pdf
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/sobotanefijadikizeguri.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/a7f96986eac17c25cf69c50f091eb62f/47403214798.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1607699515712c---4132662773.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_off000445c6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x445C6 16792 bytes
font_01_sfnt_off00045dd3.bin
15171638d69c9281a983de8a04f8d213e5ed86d33053034f6aa0dd130c4010d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x45DD3 1700 bytes
font_02_sfnt_off000465eb.bin
b208f015b0adb1c2d5d7bd8eb48fbfc75c5c61efd918480d5f1a9121e9e995dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x465EB 11032 bytes
font_03_sfnt_off00047f4a.bin
22954b229ec414c9c5e1b56dd67bb307768a1255650022e6121be7c4ff0ea05a
pdf-font-stream PDF embedded font (sfnt) at offset 0x47F4A 25504 bytes