Malicious PDF — malware analysis report

Static analysis result for SHA-256 afe36ba65730caf3…

MALICIOUS

PDF

95.3 KB Created: 2021-07-02 21:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0bb17b8aa12f3ad9d12713cde243350 SHA-1: 0a94f8430216bed24c6652376331be70554d179c SHA-256: afe36ba65730caf3f651799e3b49333a4b0e13362a0537e3efe7b80c92ac8e24
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://bigsvatcharasith.com/userfiles/file/5681173896.pdf
    • https://gadd-asso.org/userfiles/file/41368369529.pdf
    • http://0965818789.com/CKEdit/upload/files/dagofuravikabufawobalelus.pdf
    • https://dalilak1.com/userfiles/file/36167056222.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/lp7m05tlm060vgg1t3jk0gcdql/lumed.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/6dff81f8f03ca57ab31924b1a4be71ae/46227548894.pdf
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/lesepedato.pdf
    • https://anmimar.com/royal/userfiles/file/fimaledewe.pdf
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/2928130538.pdf
    • http://cepsagibyachtfuels.com/images/photos/59021064987.pdf
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/06b5049418196df164caf1b48849d042/19714101039.pdf
    • http://moda-minulosti.cz/docs/momin/file/domojogajamazus.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/p8vg5pave5m8mteet1v5cpkni0/ruxibebemikeb.pdf
    • http://neboskreb-irk.ru/uploads/userfiles/files/18829723764.pdf
    • https://medtek.vn/storage/file/zivafi.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/e47f1c11055a0a87a0b7f006cdc32432/94503192012.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/n7r557motlal5h76np3u94o1kh/98564994952.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/421bdee7281a561a994bbc27ae8566c1/pixexebodetikutitux.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/ph71ktjr96ge78mb7koqa0o26p/64141253865.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079689cbf817---memivobukitiw.pdf
    • http://kingsfinancialconsulting.com/userfiles/file/64915104085.pdf
    • https://reparationmobile.net/userfiles/file/72585048993.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/25d71739b8fd6d324200b943c5e34be3/dukakumusifeto.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdcf625509---57206407318.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=gizmo+conduction+and+convection+answer+key+pdf
    • 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_off00010e93.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E93 16792 bytes
font_01_sfnt_off000126aa.bin
80aea64e6c0d7e930d49518df2a0412cd5862ccdd2a2c685d5957a7a1dc055c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x126AA 11292 bytes
font_02_sfnt_off00014160.bin
bc60b56de5adc078893cb2c88724bbed8d715a2c27f8dfb523551f4e20356036
pdf-font-stream PDF embedded font (sfnt) at offset 0x14160 17448 bytes