Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce2c9d7c84a34b38…

MALICIOUS

PDF

96.3 KB Created: 2021-07-02 22:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 17e120780ed9ea40f278d216e8ce0e6e SHA-1: 1ac63950d0f1d5aec3e0f59de9a80338c39cb502 SHA-256: ce2c9d7c84a34b380282b2cdb30cb6cdaf9e3e0fe2a369fda70cd001427455a4
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites. The presence of numerous unknown URLs hosted on potentially disposable domains suggests an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9d464acb6---woresopatejegilabigibif.pdf
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8a328ae15---45667809511.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16071eb3ff398d---zuxefigopufokirafo.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/baa176c73a02d71788fdb2cc8b8d122c/baduf.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/ed46a2087f5387c06bfce86bc7ff81fe/gepopotirufazokiwafiru.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3f73781fb---petopad.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/9ee0d3b27f7884b978e07cd801e74b6a/64791171040.pdf
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/c12fbb7ffde0656df80939e1ce7a2770/86155371562.pdf
    • http://dragonspond.com/uploads/files/24390567662.pdf
    • http://omeofest.eu/userfiles/files/51149082421.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/16083bfbaa481b---rarekepuluwowek.pdf
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/37eb882c73dbb72625c9153934629aba/40028731132.pdf
    • http://lpkgoodframeupvc.com/userfiles/files/76424532497.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1607f35aa709b0---kedafaredod.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b19a8ac36aeb028880c119c441cfce5c/29775622511.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/d8d0c8ec73e496e6129cdf77f42e7a92/xituvolalokomu.pdf
    • http://verkaufs-akademie.com/userfiles/file/5769459837.pdf
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/ce7781a27baeefbdb374373a518f6c88/6663324485.pdf
    • https://dermatologie-chamonix.com/userfiles/file/fajupegitujetudifira.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b98ced01cc0---soroliwowozitidikul.pdf
    • http://vtvxm.vn/userfiles/file/vobejenaxigenelijuxe.pdf
    • http://consade.com/userfiles/file/34723744661.pdf
    • http://maplewoodmachine.com/clients/1/17/17f0ea2532424b9b8bf99baf53cd3763/File/51959119292.pdf
    • http://skogsformedling.se/bilder_umeny/File/43311539437.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=successful+brainstorming+session
    • 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_off0001157e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1157E 16792 bytes
font_01_sfnt_off00012d95.bin
efe6d6ec08607881e3b18ef05ff806e3547e0fe8006d51a483fade90cb14e52b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D95 10996 bytes
font_02_sfnt_off00014716.bin
70945ee33a7c83c5aed5a9d4b427a592aec6683b1bd8a129eddb33865bbfb032
pdf-font-stream PDF embedded font (sfnt) at offset 0x14716 16724 bytes