Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a68a24af3424411…

MALICIOUS

PDF

85.6 KB Created: 2021-09-01 01:19:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 728e75e26c6eef0c0fe99873b002c22b SHA-1: f8a747398476c576d9d7df5a097bda1216635d67 SHA-256: 8a68a24af3424411312d240bfd180575af71a7b0301c7a07efa7794fa089bd28
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting it's designed to lead users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via a link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://parklanehotel.asia/userfiles/file/6318017651.pdf
    • http://axwelindia.com/uploads/nozelaburizuzidagisefu.pdf
    • http://briarcliff70.com/clients/874901/File/37191202415.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1065707829---3392125098.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/64limn87lm3psfnl60d189ro0j/xipatujuxobaf.pdf
    • http://learningkey.org/userfiles/dokozoduzilata.pdf
    • https://psihodesk.ro/ckfinder/userfiles/files/xefig.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5ae8986c---rekewujaxataxubaguxin.pdf
    • https://pjkconstruction.ca/images/file/ribamurexefoj.pdf
    • https://tailormade-sales-marketing.com/userfiles/file/57142725567.pdf
    • http://absolutelyneon.com/userfiles/file/51593954515.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/pulixadugezapifikozomire.pdf
    • http://chiari-web.com/ckfinder/optimist/files/sugudadonupilarorujugiko.pdf
    • http://jgbt.us/pds/userfiles/files/3669833044.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612a0521afd38---31023019015.pdf
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/09c06b5e5b776f2014e7c6a6c277c15b/dosavulovi.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113ba2a8ac3b---xerojuwinasijawadimasa.pdf
    • http://www.aadhar-interior.com/userfiles/file/94046788319.pdf
    • http://safetyassessmentsolutions.co.uk/ckfinder/userfiles/files/34267098664.pdf
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16081890ecda32---kunuxetafomulelaw.pdf
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/886691be3c256b234c7246abf77597be/tarupegoboropewexodofak.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b469a9b0bb6---jenorarudexobukarafasopoj.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/7edc25941fcdb1992b20c8af6e7a84ae/2108262775.pdf
    • http://kiavysocina.cz/UserFiles/File/68737560364.pdf
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/858fc6a18aa259bc77a3e1a464420b84/kubumotipaxarim.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=please+see+my+resume+attached
    • 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_off0000e791.bin
c87b648bc04e048f1bf17746ac0bae07825b98064a31ad145dc61dbf6918627c
pdf-font-stream PDF embedded font (sfnt) at offset 0xE791 18632 bytes
font_01_sfnt_off00011805.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11805 16792 bytes
font_02_sfnt_off0001301c.bin
a7b1a9fe7bf10da6d80f306001b67f2dccea5f13ad12e1db3a6f8d45aa79c053
pdf-font-stream PDF embedded font (sfnt) at offset 0x1301C 10532 bytes