Malicious PDF — malware analysis report

Static analysis result for SHA-256 93294325a27a8523…

MALICIOUS

PDF

73.9 KB Created: 2021-09-18 05:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 081707f2ddae2babbeab6471bb3b1711 SHA-1: eca7e9ab850078776712dd785b899c3e99838518 SHA-256: 93294325a27a85235d4aa3d31fbf0fd9433793306adde1023fe7ada24b8fd5ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The presence of multiple external URIs and link farm heuristics supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://pixomot.ru/uplcv?utm_term=miss+crow+with+mr+lizard+ep+21+eng+sub PDF link annotation
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/xujonalutawovi.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/zopugudatoxiduliretejakuf.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/gezeje.pdfIn PDF document text
    • http://kaus21.com/userData/board/file/tiguwuxujokifex.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/kikuvebutukagorabe.pdfIn PDF document text
    • http://rexant.by/upload/editor/files/26295930569.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/76238847567.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a68b992dbc---668062241.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8343ce172---lovovivusut.pdfIn PDF document text
    • http://pro-roubenky.cz/UserFiles/File/86343828774.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210916_145024.pdfIn PDF document text
    • http://arqing.es/ckfinder/userfiles/files/muxibidisobiguje.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/8a338daba26e428c0eb03a98e3de04aa/19620149341.pdfIn PDF document text
    • https://triatlonshop.cz/userfiles/file/vatidape.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kcmrlo8gmp1uo6e1mjd3as9dt1/nunititesurimefet.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/degox.pdfIn PDF document text
    • https://nycsmindia.org/ckfinder/userfiles/files/pufoje.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/52574327306.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/67566624663.pdfIn PDF document text
    • http://hypotekaprezamestnancov.sk/res/file/93001600031.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/sisupezipusanidafoxi.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/45085008113.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEC5 15764 bytes
SHA-256: 261c5c400f0ca397e87612107d808f2ff435f9f67a08cfcb1b798a4eaff99ea0
font_01_sfnt_off0000e700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE700 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 11512 bytes
SHA-256: 5ae9565e3126f1f188c1cd630ac0c1f16dc62c8f3a151e0ee8dc9b1ec53417c2