Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bad4d0cf8b4d8d7…

MALICIOUS

PDF

90.6 KB Created: 2021-07-17 16:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0edf2c936fc84b4ddbd7807b513bee4c SHA-1: f5a500e5b63d7474e0296002c8cf742278153597 SHA-256: 9bad4d0cf8b4d8d75f825f412aa3b45901f091a19e52b29f9d36f618fe5307af
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, characteristic of a link farm designed to redirect users to malicious content. The presence of urgency lures further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://luxcottage.ru/stroykamen/userfiles/file/39645146306.pdf In PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d5b1c16cc---sidamosawaxabiposorox.pdfIn PDF document text
    • http://consulcongress.it/uploads/assets/file/8762371206.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7ac278ed6---43516492937.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/dbb3be5c7ffbda81da24dc5dd750db7b/lurulepewevumepidu.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/zidefizut.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76861028457.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/ph138mk7e2bst6hkaqd0ea8o8g/61581968122.pdfIn PDF document text
    • https://x-software.cz/data/file/66135138081.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607aee0824b7b---7949102718.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160840f8e72e30---sogajejalekuvigor.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/41832619004.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/13017279955.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/f7cedk8701bn173e0i6kn4tdtj/romemokazuje.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607b37a86c83e---givepazi.pdfIn PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/41ofibt6t5cioc7e02eulpbhsg/golefe.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/tisuzotuwurabodalakuxiro.pdfIn PDF document text
    • http://reelproductionshd.com/userfiles/file/86078179533.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/50534158173.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/40512277698.pdfIn PDF document text
    • http://22743333.com/userfiles/files/3705384527.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/73369031361.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/f562159efcb052e8832a82b225121053/jemejuv.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/q94qfp4lf650c2hscmjouppqb3/20699717303.pdfIn PDF document text
    • http://makingtheturngolf.com/clients/9/92/925d9bae4ecf380f28dbe0e1390c16eb/File/lawunoramomima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=live+sports+hd+tv+app+for+androidPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001187b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187B 17028 bytes
SHA-256: 0a41e6fb8e1d4286ec9b2a80613549cbd315fa197c26d43c76a55c74b612b68a
font_02_sfnt_off0001450f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1450F 10572 bytes
SHA-256: 20108dd7a0c497063b7fc9f1c14d3da88974b53649d03e81df2eb199960248c7