Malicious PDF — malware analysis report

Static analysis result for SHA-256 22f29beb0ec6b646…

MALICIOUS

PDF

323.5 KB Created: 2021-08-14 06:14:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c315d896b7324d7b8b1170946c93a861 SHA-1: 48aac0132bde961879e9c847dbb4c2d4f1ee1a5e SHA-256: 22f29beb0ec6b64602471b55065bb54a900dd6f297b0dcd8a71025bb6c89b5ec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external URIs, with one prominent URL pointing to 'irlanc.ru', suggesting a phishing or malware distribution lure. The presence of embedded URLs and the overall detection as a phishing trojan strongly indicate its use as a malicious attachment in a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=exercice+d%27algorithme+avec+solution+pdf+1ere+ann%C3%A9e+mi PDF link annotation
    • http://cateringkieuan.com/uploads/userfiles/file/dejimugafurumil.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d359992e8df---kenerekadi.pdfIn PDF document text
    • http://tomaszskiba.com/userfiles/file/soxujava.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/nevatinitejapivamekos.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/fe2db087bad59b6480a9dbaf8190b6ae/50236912671.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/9048490239.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/suhr25golia3ttv9vuookgc5h2/sisigifadose.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102c95bed5d3---86983076249.pdfIn PDF document text
    • http://nhasachconggiao.com/luutru/files/bawuxaxelimo.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/b81b07567d50f98c73e7a3c5486bf3e7/kuzagomugaf.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/natsesduhvecuq47cjmrue26j6/ninujolovedaso.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d9edbbe93---bukavusisonafimibudawugik.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/63928362424.pdfIn PDF document text
    • http://bagpack.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608569870acfd---loledolisefatusivawopugu.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ab73d864475---bubojuradud.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/9f4kt4ats98lvhgi03df4i2ib5/59078208148.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/20049259438.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/68238228706.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/eqinmk9qlug1bf1c88tv06t5m3/43553521651.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa70d3e9e52---sedukapuribupisa.pdfIn PDF document text
    • http://itfind.ru/uploads/file/32097659713.pdfIn PDF document text
    • http://studiomistretta.com/userfiles/files/35325968421.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7dd80a617---27956470677.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/66ffd92d2b42d9f1c0bfe0b4d8124e5e/vajadejisasirebotezajipa.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_off000492e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x492E9 21740 bytes
SHA-256: b2bef78b780407336fd5a6e4204c28e1dcb39e49a55e400826d9c2ef6ac432d9
font_01_sfnt_off0004c937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C937 11556 bytes
SHA-256: 04f66689e7137b1dfc4ea64bcc1fa89885dbc7ad708047a62b5683fb8080fe83
font_02_sfnt_off0004e413.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E413 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1