Malicious PDF — malware analysis report

Static analysis result for SHA-256 3258e6c04c330ba7…

MALICIOUS

PDF

84.4 KB Created: 2021-07-02 14:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 224f8d6eff6e37a24cb109bed20936c1 SHA-1: 057eb98177039ffbe2ecd2a093fec4a700cc8c59 SHA-256: 3258e6c04c330ba72c32f649741eb5fa107a653dd63bb369df5c49d0b730356a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The file's structure and the presence of embedded URLs indicate an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://pistant.ru/uplcv?utm_term=the+suite+life+of+zack+and+cody+season+1+episode+18
    • http://selfmadefilms.nl/userfiles/files/47465268450.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/a0c936768afce81d6f88e00f4864532d/69398640656.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc234850c6a---fitazamolabutanesuz.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da6d96c147e---3168799125.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/8a31d1de03923dff593239614aac86cf/18033769222.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c09a1c1db---77807910554.pdf
    • https://agrachoff.ru/wp-content/plugins/super-forms/uploads/php/files/5e2792a60034352a61e65cf74d3cc9c9/97199302620.pdf
    • http://pizzeriadevita.it/userfiles/files/96300919672.pdf
    • http://sbox-technology.com/upload/datoteke/14335808192.pdf
    • http://bortran.com/upload/image/file/20210531030012.pdf
    • http://igigeothermal.jp/userfiles/file/dumususari.pdf
    • http://askort.pl/Upload/file/xotafalebijer.pdf
    • http://weifong.tw/fckimages/file/48410142356.pdf
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/ufjl2d7pld5hsoggudtf0qqt8l/bukixukoxuguguzufu.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb6f1f3d500---gupopuxifur.pdf
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/46be7eea13f0a02c9f38e664a86e619e/17963170607.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/7li58vi684r44da5f7ianfqi3e/gilijuvitenasulaladobek.pdf
    • http://dhf-china.com/d/files/83016085173.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/aflf56fio79pb30q8jq3f70pap/reberez.pdf
    • http://malbreil.com/userfiles/file/muvuximeribitodop.pdf
    • https://talleresimad.com/images/subidas/files/83226927106.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160860dc27e35a---kuremawojuto.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16085e792a904a---76770742703.pdf
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/db6cbc498073ca2cfb198b83293259bc/36167102837.pdf
    • http://patokapugsnkisses.com/clients/61143/File/99152697092.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_off0000e430.bin
7fc63aea1d0142cb9100f2e306a685154bb6cc89c283b81e92265106ddd9e6ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xE430 11208 bytes
font_01_sfnt_off0000fe81.bin
f8a2d61bc286b111f2bd1639f62d0ab036fab693373135889bb1b480fdf9e986
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE81 17272 bytes
font_02_sfnt_off00012bdb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDB 16792 bytes