Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ba1200607c9d04a…

MALICIOUS

PDF

94.6 KB Created: 2021-07-04 13:43:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 85eea7b4ae878417573ff86e69b4e438 SHA-1: 15fb7b7198666e567b4a752285d9e9ef5415fd9e SHA-256: 6ba1200607c9d04a043dd3da86368093d77ff5da91df999f4c72c56ae4bda9c0
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious content. No scripts were extracted, but the structure and heuristic firings strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/0h33k9a39329rn2iq4hnvrhqn4/vawavixatagiraxoro.pdf
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/6vv7ompc83kcsc48jkcuc8o3kt/puvotitozixorafugato.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/3bde8f52977df7b377b75d21176a7772/fuvevomur.pdf
    • http://botosani.ro/img/uploads/file/82949649050.pdf
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/ubtbp5k2f3nuhndgv9mp10dvup/44370299035.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b613283110---66532695920.pdf
    • https://jooli.ru/ckfinder/userfiles/files/61411300037.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607925f68abc0---pefuse.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a49837abd95---nuzikajobudofovipoxes.pdf
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/trc02u4l7sftecs3pmgu24u7dl/93670874311.pdf
    • http://soflocops.net/clients/81266/File/wifotojagu.pdf
    • http://brianhaymore.com/images/e/file/katozap.pdf
    • http://usmleworkout.com/files/file/57002119866.pdf
    • https://betentour.com/sites/default/files/file/diximubapolosajodawogaka.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/2456bd8eb46c9b3560e1aaf4e2435550/34121457838.pdf
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/9a404a36170b2fe5cf747b3f5eefd722/81395568972.pdf
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/35c33f8146e08f16749cbe998905a86f/jaxolalosixepis.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b1e2f4e3910dabd49c495863a7bcb284/jadodewof.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7fe714a3e3---tufimumojisutirotok.pdf
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/lcl5qbq32ec1mpduic91p7a689/67349059401.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/b5e618e31684b83fe4ec6542ce28e086/verig.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/25097763ec3e6e3af6b4e12643188bdc/dukosawol.pdf
    • https://tectrongim.com/uploads/files/dufuvubelisew.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=black+crested+titmouse+call
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/b15fc4ad9582427ce1829c3a1e09ea12/digexorofibagim.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ce.bin
3276476da35934650abb178690ac655a57b8264cd3e60d98b44724f0a54d5d73
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CE 10672 bytes
font_01_sfnt_off00011158.bin
bdf7e68a616906ceb06b59856a9cc83a3c75857cac4e4d525d70cddbb5534771
pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 21720 bytes
font_02_sfnt_off00014647.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14647 16792 bytes
font_03_sfnt_off00015e54.bin
54ce8d1c87b65904628f08ad5bf35d7c62c7b54c56459eff751b121dada53bc3
pdf-font-stream PDF embedded font (sfnt) at offset 0x15E54 3612 bytes