Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ca9a01a92aa3c60…

MALICIOUS

PDF

86.4 KB Created: 2021-09-05 11:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 02482f578660786abba188acd0b619ed SHA-1: b6b65812d5b066ae2f77c138639a3a104b32232b SHA-256: 9ca9a01a92aa3c6048f2f6ba166766002a20d60045037b66b4d6f037b4353baa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links, many of which point to compromised websites or disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious content or downloads. The document body is unreadable, but the heuristics and URL analysis are sufficient to determine its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • 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.
  • 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 http://fotossc.pl/_files/file/3477019589.pdf In PDF document text
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/e24lh0n3j8j1318hku05d0p4ju/gunan.pdfIn PDF document text
    • https://tsafar.ir/basefile/tsafarir/files/87489335653.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b00937e19b---11210856340.pdfIn PDF document text
    • http://banner-ever.com/ckImg/files/wodopizexamirovad.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/dufozimusuxudumedeparim.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ab74f942625---40292176258.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/tebonarudi.pdfIn PDF document text
    • http://agnieszkapawlik.com/userfiles/file/70741424804.pdfIn PDF document text
    • http://skyrybupaslaugos.lt/uploads/files/2411957521.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/c0ce3d15d28348a4eefa1096b0a8441a/jejirizebupomabiviluva.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/f0bc3f80df16eb551ffbf71cb4ba33b9/50083436304.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ff0cd8bb08077b0ecdfd3391609591a5/36041750549.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/mevuzoda.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/edcf34b70e4915263c00bb09c8d10761/82370705188.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/76151623527.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afa8a14272---baxoz.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/86326473579.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d439cbdade9---tinorefikas.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/f43896be7586f5e8bc9f0c612235ce5d/68465930021.pdfIn PDF document text
    • http://mvsexpo.ru/admin/ckfinder/userfiles/files/rifaluwipetuwozosijuruvi.pdfIn PDF document text
    • https://ciar.vn/uploads/image/files/muvetu.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/52165479610.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160c398831c855---8081659080.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=goodbye+things+pdf+freePDF link annotation
    • 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_off0000e69a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE69A 20368 bytes
SHA-256: 865663189c63bb45290708b7d59689250fb1bf19485654a35dc1e3cf36b4c336
font_01_sfnt_off00011bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133F2 10860 bytes
SHA-256: ec7484f7d245fbb6a40f3a22859fa86a808c28af1138e1e668bf9b13fc2f7e43