Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb214402fe75dd2b…

MALICIOUS

PDF

92.4 KB Created: 2021-07-23 00:28:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eeaadd3a969106e8220143d68bc615e1 SHA-1: bfbb9fcbd52c891b4a16e42ba5bf85bc4fd49537 SHA-256: fb214402fe75dd2b2c3a6e48e83c107df334d4dae431d8a5d0117f00a43d7959
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to compromised WordPress upload directories and disposable hosting, suggesting a phishing or malware distribution attempt. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a deliberate effort to obscure the final destination and potentially evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bwlpsalisbury.com/uploads/files/zofazafetabedafarob.pdf
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/88887434363.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b370f14b961---pujaduwuzekoxulevatib.pdf
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/2ab016d78e90b7970412d68dcd7902c4/21088536321.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/uv7qv1imi3rocseuf231d7vfu5/93734722986.pdf
    • http://thaisomboonautopart.com/userfiles/files/15647876010.pdf
    • http://envigest.cz/upload/file/juzukapuxerakatudirijo.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/lokaxil.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/4424939dee840ae16734dbccab10cfe7/budut.pdf
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/ea4393a6ed074d198ba33280a479714d/sagol.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/7ed2310da11256bcdb520a03866e2aec/givaketutafu.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/5f301e312e611fed7b6e21915b0b8c3a/jevajigam.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/3757fc3c802edef432e434e60d11e8a8/91998272629.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160f1b2322b81b---vigunilafijizifidolozis.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/7a2evie50t5jsudvvu0nflt1jp/95019762514.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7b63e6cd5---48861036571.pdf
    • https://pametnidom.hr/pametne_kuce/userfiles/file/mitut.pdf
    • http://blpest.com/UserFiles/file/63846291850.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/96e345553dbe8c1fb9830e6fb309569d/noxobezuguzagepikuge.pdf
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dijikasenim.pdf
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093fcb8da376---kovorofe.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/aftrgn3i4pb7logj5rhm5orv7c/raxomabikirijote.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=aacn+synergy+model
    • 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_off000105e0.bin
a851c405787d0496e00629f2eb300f2b28b2e9117539163632e3883179779308
pdf-font-stream PDF embedded font (sfnt) at offset 0x105E0 10616 bytes
font_01_sfnt_off00011dfd.bin
5cebac73796213731bc125fe40fd0513ce3a11b96a2bb18ce564083cb9f698a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFD 17620 bytes
font_02_sfnt_off00014b7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14B7C 16792 bytes