Malicious PDF — malware analysis report

Static analysis result for SHA-256 e058122576708068…

MALICIOUS

PDF

77.8 KB Created: 2021-08-29 15:03:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: db1d69d40209e89d4d583c3795f383dd SHA-1: a010f05b1b781eeef299b1d3046f3c344a20eda9 SHA-256: e058122576708068ee73526a0e47a8f25092f5b59bc289329c6a70ef41583a1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous compromised WordPress sites and disposable hosting domains. The primary purpose appears to be distributing malicious content or conducting phishing attacks through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://crewmak.ru/uplcv?utm_term=ministry+of+community+safety+and+correctional+services
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16100f7458a08b---32431751933.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/2312d476ef1ea30116c724c75b7ba0d1/63916282787.pdf
    • https://nexusmediation.nl/files/30346358318.pdf
    • http://staractivecollection.com/resimler/site/files/41734136649.pdf
    • http://toyotarent.hk/FileData/ckfinder/files/20210813_53424B98409533FB.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/25703cd500315517f1bf503702dbc711/96439508721.pdf
    • http://everest-c.ru/ckfinder/userfiles/files/94044874741.pdf
    • http://elsekmont.eu/userfiles/file/86458383982.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160f02bdd471c9---77817887436.pdf
    • http://neoneofitou.com/ckfinder/userfiles/files/nuvujut.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160764d6a1a255---86071798863.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160870c3e38a05---34420374013.pdf
    • https://musikkursus.dk/userfiles/file/zuwufuzasa.pdf
    • http://rklatex.com/userfiles/file/gupezagiromezu.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c6bc40c52---vuvevomusomoredamifavipo.pdf
    • http://robwalker.net/fckupload/file/miworiguzoxufusedutenazaw.pdf
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/ce9d805e6c427fb9e61857e3276c6c5e/17012701247.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b787cf541d2---tometajosukegivodak.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160793c8d5ae3e---lisew.pdf
    • http://mebel-moscow.com/content/xuploadimages/file/19595964854.pdf
    • http://mnogonomerov.ru/uploads/file/36120219062.pdf
    • https://vietrocknet.org/app/webroot/img/files/fokesogobinaxevigulilabe.pdf
    • https://jeneifogaszat.hu/cikkdata/files/rabatag.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608779e27ac20---xozukego.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/oereiuldr72rk6vbsrpo340j36/lidiw.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_off0000caf3.bin
de05d93a44353d89eeeba69e29e60626b73f018c007396b3615970bd6c2bc21c
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAF3 17456 bytes
font_01_sfnt_off0000f72f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF72F 16792 bytes
font_02_sfnt_off00010f46.bin
41282321455393a2c2bff981ab30778ae8eb15319c5d1664940a07d4da1110a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F46 10908 bytes