Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c2372c9742fbd79…

MALICIOUS

PDF

94.3 KB Created: 2021-09-05 13:47:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 50f3ae6cd95503c201748523e646aea1 SHA-1: 2ac6d4f9cbaf5419970fbb1db1826428657ee0ec SHA-256: 0c2372c9742fbd796c26fdb75863f4fe989ae3b4eacdad2e3f63f3c51d25f322
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://allytemp.ru/uplcv?utm_term=death+anxiety+questionnaire+pdf PDF link annotation
    • http://gianenricofabro.com/userfiles/files/5425634822.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094095001e3c---95835995005.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/12083120240.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/66587439860.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/11043844434.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/1a1b0fa24cb88c825b5438e10af1b22d/10620759171.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/snhku6t2j041cpl3ug4k7h7pr1/degudomivuxerinumotetiju.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107e0239ef6a---gojiwuxubutid.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/lasoxomatelipupener.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079bc4e8263f---13569932812.pdfIn PDF document text
    • https://bloc-immo.com/images/13302491803.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/a76c36e08820c42781856c86ef11e2ef/95950050339.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/fuzepiwikadipalugi.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/meduripipofal.pdfIn PDF document text
    • http://tecs4.com/intranet/ckfinder/userfiles/files/13267796542.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/87178759809.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/morexedekiguretovoxo.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47666302316.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ns1d4tiedkcsac675u6ofbbg6o/69733692968.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/67244725577.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/92163804709.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160897a8f0b65b---bonewumo.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/98842529457.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d9c0e84d6---24354997692.pdfIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000efca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEFCA 17848 bytes
SHA-256: d05810bd904539f41fa038c59e6d6a4ae5719f5ad03779876cd0d75e460da9f9
font_01_sfnt_off00010bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAC 11012 bytes
SHA-256: 863c16ad45f21c9f27b69c8d7284be2599708fc70a4b44620454e278834768b9
font_02_sfnt_off00012513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12513 17692 bytes
SHA-256: d0d2ee465b7699adc9cfe2751c3caca4aeffc4c7c1ea1e78729a10e5afa326da
font_03_sfnt_off000152d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x152D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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