Malicious PDF — malware analysis report

Static analysis result for SHA-256 0130facd06d2b991…

MALICIOUS

PDF

91.2 KB Created: 2021-06-27 01:27:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0c89c08b6ee129f1875f490e15e3d50a SHA-1: 78d94c9a7b21882b275f23678731e004c1023539 SHA-256: 0130facd06d2b991e46ea3d9647bd0f039d2c2a2bbdf14cb5f82e3ae266a5689
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads or hosted on disposable infrastructure, indicative of a link farm used for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or delivering a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/0r9ob5utpcruogn8qddk83otgt/divatep.pdf In PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/ipbi6q0ikp81s9ikfebr0sdf69/18045255701.pdfIn PDF document text
    • https://motacademy.it/file/fodixogigeneroxesugus.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/olshsd49arr4baui8kuhogupsh/48481369447.pdfIn PDF document text
    • https://kisikana.hr/userfiles/file/42289693868.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076cf6d8f8f3---21952639463.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e9574e4355---kofipuzutazamebosubilim.pdfIn PDF document text
    • http://vhktn.at/images/content/files/14179173914.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/kv9k0k9dnjugghl0m5m21uutbo/rikabojutijejinawajufu.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d09355ce885---41254644231.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/43958125616.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895b3a9650a---wanoxaroxawatedebomol.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a099eee56ec---teroki.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c4da65b33f8---71539005301.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/e2a5feca9e1dda246fb012c2b1403ae9/vikilo.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/491fe2188236447445035ae5580b7f12/pesulapokabawe.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/98d2d0ee7704e8ed357dad8454456ced/potubibarobal.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/tgd5tr1887b4l0vrg9th9auhe0/penetamibijubolupilipog.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c24cf7e717a---6142592407.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7903e9dda---bibofamufi.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/kad028aqvt667l420u9p9u8ik0/sewob.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/momapenizir.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=examples+of+codes+in+thematic+analysisPDF 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_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000117aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117AA 10984 bytes
SHA-256: 4d54dd4ebd533189174b1c9ba593b5f443652e869f7434b816370f68230fbdb5
font_02_sfnt_off00013103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13103 17320 bytes
SHA-256: 1bcebf33348fcda2c35c019a98a5f6bfe1c5604d7ad76afcdd3be3954ab75487

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