Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da4e6ec75493365…

MALICIOUS

PDF

72.7 KB Created: 2021-05-29 05:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 32167d64c46ccb5f4ea7d0d4080f3930 SHA-1: ac20d6992f3860af03c9cf90f597d66caf3e15fd SHA-256: 2da4e6ec75493365b9b97cbf11232973f4e357193f608c3620557d6ae95dcedb
156 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and exhibits characteristics of a link farm. Multiple heuristics indicate the PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting an attempt to distribute or mask malicious content. The presence of these links and the overall structure strongly suggest a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/4f9fde4d18957e1f014cc37a7733ff05/81970043687.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/449c018258e608ed7b4b6ab45d65c3ea/limurozikivonazolite.pdf
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/n38l6um3bj8al86c7ui75eo1mt/fugesafate.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/ibe5p2h5kja6hf6erg15kmmm0q/88858503146.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/5db8efad4b2b0f27eb24b937b5c4d2e6/7394193418.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8d1063000---tugufon.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5f7de369b---46400547167.pdf
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/1afb8f62fc48c1d02a1958c56110a724/gitoz.pdf
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a59e9578ed8---81033504590.pdf
    • http://dambi.pl/userfiles/file/7457996277.pdf
    • https://impactcleaningserviceskc.com/wp-content/plugins/super-forms/uploads/php/files/85095a39b3703c9c93b2826fe8aa0a17/33808760038.pdf
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/vanix.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/7000d3271b3aa38e91b8c3e8ddce85b4/zovatosigomud.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080adb5b81a3---82826964881.pdf
    • http://www.heksan.com.pl/file/rituzafisoru.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb8495b061---moneneforokiresatezulofa.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/5ger4lho6p8ijp6ag3v8bb753f/dezadapetutazidaw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=colorlib+free+html+bootstrap+templates
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e296.bin
4e03abafb20a6cefa31cb1eba1602f137430a336f6bcfa3bb69ebcdac56e61b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE296 5188 bytes
font_01_sfnt_off0000f404.bin
49213c06d202b19993f7a211a59c3ff938a73d34aff548b229d5258278cd0009		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF404 10008 bytes

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