Malicious PDF — malware analysis report

Static analysis result for SHA-256 06363e5da5fb543a…

MALICIOUS

PDF

84.4 KB Created: 2021-07-02 18:14:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40b12f80fe829e5fdf544418fe8455de SHA-1: 73c8cc31fc559986af313d1861262634f1280481 SHA-256: 06363e5da5fb543a5268927f9c227ef54aed563da1c8f1c78ebba6746f86f62d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm used for phishing or malware distribution. The presence of embedded URLs and the nature of the heuristics strongly suggest this PDF is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160873bf4d9dba---43099232193.pdf
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/81kgg9sqkihtd6u2nmm67vc56u/dogazowe.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc1a8019ea---nelimixoboruti.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160b013cff214e---63870723711.pdf
    • https://digireg.dk/upload/14770816735.pdf
    • http://banghaija.com/userfiles/file/romebaxilegelebatak.pdf
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9b07c0463---69294954266.pdf
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb30c8e302---69482640046.pdf
    • https://alnahamgroup.com/userfiles/file/mipizogurekeriwa.pdf
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/nanadunofijaxududajadanew.pdf
    • http://tsrmmessina.it/userfiles/files/95518677703.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a4681d476---82909718431.pdf
    • http://itineraire-consulting.com/ckfinder/userfiles/files/repagadulajovo.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/vv4c55a58b95r4ovns2pnc4bp1/93948469003.pdf
    • http://anneadamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/34539372822.pdf
    • http://ekolojikweb.net/upld/userfiles/file/sutalozodawejabirodolu.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/fd48596ce46b586434619367502cb332/fubuluwavenawubizelexud.pdf
    • http://sooclose.eu/upload/File/14490647885.pdf
    • http://logo4you.dk/userfiles/file/13514959089.pdf
    • http://thuduchouse.vn/pics/file/rizawetezabikimubi.pdf
    • http://arcstema.com/userfiles/files/lowezopilatavopizox.pdf
    • http://dgjinhak.kr/DATA/upload/files/202106211254267585.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=forensic+science+aust
    • 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_off0000ea1a.bin
003155f1364ed7d3d1b31e25e0db28676eea8c3412df90ddedb9387164999ec2
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 16740 bytes
font_01_sfnt_off00011551.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11551 16792 bytes
font_02_sfnt_off00012d68.bin
6304c57827401a6c22e1702ae908e8b0306680205159bc54bea6959888d7abc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D68 10252 bytes