Malicious PDF — malware analysis report

Static analysis result for SHA-256 b002d5adb7a554a9…

MALICIOUS

PDF

85.0 KB Created: 2021-06-26 11:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 16a3e8422bbfe0eac990e9be47ddd0a2 SHA-1: 6a7da0095d706575715400af8738542248a3b750 SHA-256: b002d5adb7a554a9d787bbb86922acede8548362ac35476a5931c54d63edc311
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites and 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 through these links. No scripts were extracted, and the document body was unreadable, so the rationale is based on the URL analysis and heuristic firings.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c49b20c2c---vuwibi.pdf
    • http://acecaalcoy.com/userfiles/file/76214109060.pdf
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/3ab2190f4a15494cccf2f722397e9c6d/lokaravuvunupupajul.pdf
    • http://sparkpro.lv/content/file/geviginosefeten.pdf
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/fgadvkjhjei6l748mf77vo4dko/58348499130.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/9c8f4b9c5a18b4dd1e39059cad9a74d1/19629805434.pdf
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c84c1def10f---53980432653.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160708820411d9---40051936308.pdf
    • https://www.limratechnologies.net/wp-content/plugins/formcraft/file-upload/server/content/files/16082bbea386da---68110316331.pdf
    • http://iberia-ex.com/images/blog//file/69583219036.pdf
    • https://artbynela.com/uploads/file/99837052691.pdf
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081813f46d1b---zufusisububalobafisupu.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/mabr5u1htq72upi52j7gu5gr1d/87262420220.pdf
    • http://lagunaapartman.hu/images/user/file/xigasimagi.pdf
    • https://timjanen.se/anvandarbilder/53/files/57345899373.pdf
    • http://abnicum.com/files/file/58374878594.pdf
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f370e7e688---fapanategenari.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160820e34aeab8---48944287043.pdf
    • https://vegas-shop.net/uploads/files/tewatowarutuporum.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077f55e4acb3---96307515333.pdf
    • https://drticket.ir/basefile/drtiketcom/files/lujogigatedanotijuno.pdf
    • http://lamachine.nl/userfiles/file/52242181192.pdf
    • http://davidhammerstein.org/userfiles/file/mezejofapi.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077012207630---91932133834.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=dog+gone+gone+and+done+it
    • 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_off0000ecad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECAD 16792 bytes
font_01_sfnt_off000104c4.bin
9d8c75d5cbd91eb9ca0edd2e46af60baf028575dc211d88cabad1d65de65bcd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x104C4 10108 bytes
font_02_sfnt_off00011b33.bin
f77867e5bbf44acbdf5331955889fea35d6189a2effef672b54fd0bc1af25e8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B33 16796 bytes