Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc41ae7dc0ff83bc…

MALICIOUS

PDF

83.7 KB Created: 2021-06-29 04:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2ff6d5ca443240f26083941f6f9f6e40 SHA-1: b2844e7cf43a1ecc49369a62bf30f79f862318e1 SHA-256: cc41ae7dc0ff83bce2db0cf2a06e594c7aebf4847c5f6be67d2eaed23348cf2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as a phishing trojan. It contains a link farm pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the presence of numerous links to potentially compromised upload directories indicates a likely phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/hl3spu7t53ok8p313it4hmcfka/rujokag.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c30a3da1a---gexama.pdf
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/4f9dc221b91e54a53caa87cd88b82ec9/94508452792.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/lpebs4sfdn056tcg8pcft0tqsh/dozixorepara.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa455d3a1f4---40289728297.pdf
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/pajatukegogigefamipiz.pdf
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160d8b67667c61---wurunu.pdf
    • http://artospace.com/pics/file/32390744454.pdf
    • https://alajuusa.ee/media/contents/file/50420589359.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086c53367c05---lunojene.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/14e10c39a26376a1ebaee42b84307d42/74629913002.pdf
    • https://vasantviharproperties.com/userfiles/file/29414310510.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/5gssjjih3b0pbh5fgo4jdan0ca/1758443326.pdf
    • https://skvely-kup.cz/files/file/kexejawipisuxegosajadex.pdf
    • http://sfera-vlad.ru/img/file/64142010406.pdf
    • https://binarbaidfabrication.com/public_html/userfiles/file/62148021167.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160883649121b0---sobiwaxer.pdf
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/3771e1291aa4311c8339c235803ec138/64937497509.pdf
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/73541653486.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d39dd8f336---46142366899.pdf
    • http://amctop.com/board_data/editor_img/file/202106171914.pdf
    • https://brickbodysupplements.com/newerac2c/userfiles/file/pimibebilajagide.pdf
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/0aa8f51fa86f48bf0972a9d6b62ad424/92284817445.pdf
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/de70c00fcd1364fe3b398dd0dc5a466e/62854860443.pdf
    • https://an-professional.ru/img/files/file/sokiga.pdf
    • http://elsekmont.eu/userfiles/file/kokotofoloxagemo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=44+inches+to+cm
    • 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_off0000e6aa.bin
4bb5153fdaf588c948764ff1afb450626d6d6e61adca0ef97d4d59c8cb74459a
pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 10168 bytes
font_01_sfnt_off0000fd39.bin
3cd29dc9eec4c96986c0701085a4946ebc90784092482d32cdc3b3f27a0fba38
pdf-font-stream PDF embedded font (sfnt) at offset 0xFD39 16988 bytes
font_02_sfnt_off000129ce.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x129CE 16792 bytes