Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0ad372954e70f80…

MALICIOUS

PDF

80.2 KB Created: 2021-09-07 13:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6ec603ca760438a2dac5211958a8076c SHA-1: a68c1dd16c241c2824bfad3eeabf0031911f6733 SHA-256: e0ad372954e70f80c3e52970aa97687361709ad43170d6d7babec206d9fbfd65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://infrive.ru/uplcv?utm_term=asking+giving+directions+worksheets PDF link annotation
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609c53727395c---36153624577.pdfIn PDF document text
    • https://2acontractor.it/images/file/11617013542.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/xinidiziroxatagaj.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/siloxezit.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/46403096518.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/fukaputaxadojunib.pdfIn PDF document text
    • http://photou.cc//ckfinder/userfiles/files/96400840020.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/118714332660f22aedbcb95.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df8a2f997a0---53476477140.pdfIn PDF document text
    • http://studiotecnicoarduini.eu/userfiles/files/32666014784.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132df3a145b2---39989304977.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/tabexiwe.pdfIn PDF document text
    • http://bmhs71.com/clients/c/c9/c97ff408e01126d63256cf68004d6641/File/ropefotoniw.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/20513030333.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1611f817add0cb---gukuwi.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/teliwilakifosebadesu.pdfIn PDF document text
    • http://proxima-design.cz/files/file/derufe.pdfIn PDF document text
    • http://rhodeislandalpha.com/clients/56223/File/38693128646.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/geridefaxubinuvub.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c0ed8d2291c---66903214094.pdfIn PDF document text
    • http://www.kammerpop.de/files/file/89993788546.pdfIn PDF document text
    • http://bradzo-ep.com/uploads/files/92721701758.pdfIn PDF document text
    • http://misr-consult.com/userfiles/file/zazod.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_off0000d680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD680 17336 bytes
SHA-256: 5d9650b9d95db9621e5102f748a6cdc8d8d8ef646a93e43caec299e09ebf9814
font_01_sfnt_off00010300.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10300 10664 bytes
SHA-256: 2c8c5b0ea5e8fc0000bd4bf1d02d532e1b8774917a13fc20fc65e85d8796ea48
font_02_sfnt_off00011b42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1