Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc516f0cca082fa…

MALICIOUS

PDF

80.9 KB Created: 2021-07-02 05:05:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6d53492bb63c4035d9146537e72ab577 SHA-1: 585151750f5e5d3468cc808bce3b1a18d1e715fc SHA-256: ccc516f0cca082fad4a05b0c87565b8454a5ca05bc3a604b8498356d4a1b6bab
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other potentially malicious sites. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

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://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093043bee35e---26557358777.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/cc7bf54b21d4f74c9d638e884a6c5b32/85298264025.pdf
    • https://alzubidi.com/userfiles/files/difubovobuvig.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/5a257549083b64d56043a674e88dd1d8/posabosokinarole.pdf
    • https://questyme.com/userfiles/file/nulevapon.pdf
    • http://velocimapper.com//webfiles/file/puzetalafes.pdf
    • http://kulturazebrak.cz/userfiles/pitobinugevi.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609ade5539b12---zagefinozof.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/us9dbspfdhmjpeb60gl5p3rq7r/tomudikojafitijigopufes.pdf
    • https://haidangpc.com/contents/files/94721917416.pdf
    • http://sammyuriasproperties.com/userfiles/files/powuberunusak.pdf
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c33bb702cf---zosinoletigadojewixan.pdf
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf2066a4f3d---levowudufavozaloxadebotu.pdf
    • http://fixafilm.se/userfiles/file/53054248128.pdf
    • http://naturallabs.de/userfiles/file/79115129710.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/tujfs49v7a5fdi8sv5nej97deb2m91a3/60182239188.pdf
    • https://consurs.ro/ckfinder/userfiles/files/ladoximepumedemubed.pdf
    • http://beiwendq.com/userfiles/file/nojaxeworosi.pdf
    • http://chinajnbt.com/images/upload/File/nafegi.pdf
    • http://fedoro.ru/upload/file/wofozosi.pdf
    • https://digireg.ru/upload/degititu.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0a4def401---34062156808.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/5910af02155b8101fa5c8144a63663ca/10162847870.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=giloy+for+weight+loss
    • 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_off0000dcad.bin
1038cfea1b46890f155ec1bba70b1caed47a03d7a0e96c002feccc76c2d0db13
pdf-font-stream PDF embedded font (sfnt) at offset 0xDCAD 10464 bytes
font_01_sfnt_off0000f4a9.bin
edfa515be1cc58dc7f496a9e60850298ef3ecbcc59e32843187e61dbc81b58da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF4A9 16308 bytes
font_02_sfnt_off00011e5f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11E5F 16792 bytes