Malicious PDF — malware analysis report

Static analysis result for SHA-256 5467971bd5dca02a…

MALICIOUS

PDF

175.9 KB Created: 2021-06-30 14:41:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c286e3611fb290a025bf5092281449a3 SHA-1: 0252581a2b49ec86d7aef0ff6ae1ff0dbad842f3 SHA-256: 5467971bd5dca02ae21442449317ba1f1e80ad84994e44037a44229af8116e1b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The file contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to host malicious content on legitimate but compromised infrastructure. The primary attack pattern involves directing users to these compromised sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/80d640068091131dcc44d238ccba0846/dafibavofana.pdf
    • http://rld-carbon.ru/file/resikelinoxawiromawedowij.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c4cd4c84b6---95298736857.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/b3mi8t651ao11fd9pt7sq2i053/716440086.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090c511bcd3a---55332273210.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/a74aef5bc0891b75239241f56b5e5902/23659371480.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/vd60e5da8n2t225u0tmg6bm6r0/35118545093.pdf
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/7a5e370c39dba39243eabd0f4a953ec9/96701751732.pdf
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a916703f02---74433705541.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed34c41e8b---32294046047.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829a6625aa1---bapapa.pdf
    • https://atlastoursntravels.com/userfiles/file/mabenutogi.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a23cda8577d---78301230423.pdf
    • http://hanhthien.net/uploads/file/48249719136.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7a7de936b---batosopafelatazavag.pdf
    • http://brandiassociati.it/userfiles/file/45336649155.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073c4aded3cc---wilobomidagexizutu.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/mgbkeddhhkd3rbtf8pnql50156/nupenolabekuxosoziv.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/b2802c07607ce1d728fb80f8bca04655/52415063549.pdf
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acdde6dfde6---8873965005.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946631d672a---15674288668.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=becoming+the+hacker+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_off000253c1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x253C1 16792 bytes
font_01_sfnt_off00026bd3.bin
c1a3f6e6d89bc112cd1fc006afe847dcd6c0f2f51325c2748680a02a2a233992		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26BD3 17348 bytes
font_02_sfnt_off0002990c.bin
d0e39689402d770218571f55fae93aaa18eea877640b4039b4f02d37a32506c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2990C 11000 bytes

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