Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02f221af330d7fa…

MALICIOUS

PDF

86.0 KB Created: 2021-08-23 18:23:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6617e3b2c2e5299b945a01b9731f283a SHA-1: 694462d1ab8982406f9a3690a462e2629727244a SHA-256: e02f221af330d7faf5618ce83fb0c9246f87036b62c47a0571faae40fc14bdc2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to exploit users by directing them to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://medvor.ru/uplcv?utm_term=inventory+management+literature+review+pdf
    • http://gat-asset.com/CKEdit/upload/files/83531137770.pdf
    • http://heatherjansch.com/ckfinder/userfiles/files/xukekam.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/ed98c223cdd13c281dbfd5c9f39eda9c/78433917309.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/0387050b805de3bbc45e36975d3e924a/pekokazexavugajufexeb.pdf
    • http://wo-kop.pl/userfiles/file/patufixifezekifuwitena.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc1481f034---losorevenikajukavemubero.pdf
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16096b17d9cb4b---fenenejifofopirirulomig.pdf
    • https://bestcaps99.com/ckfinder/userfiles/files/67060055450.pdf
    • https://shiokuda2.com/contents//files/taxowirumuremeri.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608d49cf6713c---11317716119.pdf
    • http://petgears.com/app/webroot/files/file/44640590334.pdf
    • https://www.mds-horizons.com/upload/files/57088111355.pdf
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5d3c19bcb---39821316125.pdf
    • http://myblindz.com/fck_user_files/file/38700249928.pdf
    • http://hotelrealerimini.it/userfiles/files/xubowibotewerodeduj.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/ebe6fd4ff56e4af8efb19f19de54a535/tikufekebavi.pdf
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/ag2p693mrmrh9i2q8s8spmdj65/48210666287.pdf
    • http://aryajob.com/user_upload/file/241869874.pdf
    • http://sireny.net/share/files/pojavadolapejemoxoki.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1224cf3b710ac8a52b4c24e192c09f3d/95959654075.pdf
    • https://rjiminfra.com/wp-content/plugins/super-forms/uploads/php/files/aa9cf43624172239be93b4f8d3da4ff5/4811503771.pdf
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/b5150a9b5d2e8cba86cb297d85a5ca61/xokowetifafajifutijusil.pdf
    • http://ogledalata.bg/uploads/pages/files/21709786624.pdf
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/99896fd754c1a339767e83bdf42e86bb/dopube.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_off0000ec3a.bin
9344aeedf1c50918db322426860e6a3a12f189fa7c7fb6c0144b44ff7973eb81
pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3A 16968 bytes
font_01_sfnt_off000117dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117DD 16792 bytes
font_02_sfnt_off00012ff4.bin
40e721d8eb51d774676d09b7975d461f0ad6a1b3c57e3429e29fae36dbe723d4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF4 10992 bytes