Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc0bd031deec86cd…

MALICIOUS

PDF

92.7 KB Created: 2021-07-29 17:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97a3e6eca28a7ec7523e207f7752989c SHA-1: 4d987c61523273dad23dab45eb08405b615b8422 SHA-256: cc0bd031deec86cdf2387883806b4fdeb1e6a2c15fc8a4e6c2caaf8f244074a8
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as lures to download further malicious content or redirect users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecb66e9193---mabejitok.pdf
    • http://mdknoodles.co/uploads/files/babipojuje.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/91vev1nqs71tkq5l6aioqod3i7/9629165252.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/b8499d358ae56eac9fb27310895a9bd5/31642606291.pdf
    • https://biothiennam.com/media/ftp/file/48643031463.pdf
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d7524387d0a---4371102032.pdf
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a6d45c9366c---22555835451.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b422ee67981---pixipofukiletupizomusopug.pdf
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097f270b7f56---rokuzukilenimokakovozuduv.pdf
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be389f1b308---zemexivifogewobusofa.pdf
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b43f5d9d0---nazozubulize.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ab0fd9e02---fetewexaratewipafifelim.pdf
    • http://interiorconsignments.com/media/file/25074423781.pdf
    • http://kythuatviet.vn/uploads/userfiles/file/lukilakedole.pdf
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/bosim.pdf
    • http://vekosgroup.ru/userfiles/file/16164079361.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/1d4210ab329e7fdf164505c03acccda9/nuvaxawiti.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40c343d2c9---mopobugatozitiditaniw.pdf
    • http://cutskytools.com/d/files/89705135891.pdf
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/5f82dae9d905fb94af07086ed27965a1/libire.pdf
    • http://arunimaflavours.com/userfiles/file/49704516074.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bb1b96ccf---fitos.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=earn+to+die+hacked+unblocked+games
    • 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://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_off00010544.bin
924f5d9a7a36d185f76702d0eb888aef1d79cd40cf7d73f909756a12d93d3851
pdf-font-stream PDF embedded font (sfnt) at offset 0x10544 11132 bytes
font_01_sfnt_off00011ecd.bin
be7e82b87bb4f1f7495e517cc9120414f69de53b5ecc8f413ac592857f006651
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ECD 18164 bytes
font_02_sfnt_off00014ebc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14EBC 16792 bytes