Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b2c2daf12a290cc…

MALICIOUS

PDF

85.3 KB Created: 2021-06-11 18:15:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 14eb9a27b4c863aa4ba48b52fc788b45 SHA-1: 56b011c4027d024c6afbf3fd4cc636f22e24da9e SHA-256: 2b2c2daf12a290ccf13a9f570d2d585d41a7c867c628bb08b9ca0e3d926b4bbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many hosted on compromised WordPress installations. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to manipulate search results or distribute malicious content. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' further supports its malicious nature, likely serving as a lure to phishing or malware download sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://smidgel.ru/uplcv?utm_term=how+to+use+airpods+with+chromecast PDF link annotation
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/47ec12252a6914e9a2481b1ac4a5e3e2/sexusidagozujepen.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/hdmrc9t1n8ok5ijn04521it0k1/14561743685.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3320db7108---zolubo.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/26405707886.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083735c1d7c4---mixuvomenujifutininosifi.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/6fdd79d71a64b71e4681a6222beaf313/24203512279.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/55ee7a1411031b6aa2c4cd064a13b834/javakasipivexi.pdfIn PDF document text
    • http://evansmedia.ca/userfiles/file/95566432438.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/9ec9fc4e04eee8ad45451d86a91b7edc/xifoma.pdfIn PDF document text
    • http://ahlhy.com/uploads/file/011533479353.pdfIn PDF document text
    • http://hillcresthigh1971.com/clients/9/9f/9fbf9047a6869172a982db6f42f05a9a/File/86307284460.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160af3f8a71389---pujovazaxojonujudezepi.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48baa0d57b---tupomutekefew.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/35a609a7cbdc07b2e69588c1ae5c48f8/juxuf.pdfIn PDF document text
    • https://martybermanassociates.com/wp-content/plugins/super-forms/uploads/php/files/ba0aac5f6ae31bbaedbba389f4d03eaf/zosariv.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/gokafokegoduduta.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/2562651708.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da04520f94---bosipavivumoxunanufo.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac3e32fc09---85818958203.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/iu2f9s6igc482mhdfbaebfp9v3/gozel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F47 5332 bytes
SHA-256: f2b973cca281c8efee9a55492429ec1ff4895793aaf896221712198e1174786f
font_01_sfnt_off00012150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12150 11368 bytes
SHA-256: faff8ce58cabe659ce30cfd5e12a5dad2759ab179058cd0f396f74581a42511b

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