Malicious PDF — malware analysis report

Static analysis result for SHA-256 62a340942a8df0a7…

MALICIOUS

PDF

74.4 KB Created: 2021-09-01 09:36:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 62436f36c0cedbb2c037776a8fa712e1 SHA-1: 89a9083017c0417ddf780008cc4399958a82789d SHA-256: 62a340942a8df0a7f9abb1981553dafea61ad85edc69358f85e60a4cdc838dfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The embedded URLs like 'https://infrive.ru/uplcv?utm_term=need+for+speed+most+wanted+2012+file+size' indicate a lure to download potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://infrive.ru/uplcv?utm_term=need+for+speed+most+wanted+2012+file+size PDF link annotation
    • https://shinaltd.ru/images/file/dibexomolunodate.pdfIn PDF document text
    • http://assisdrive.pt/userfiles/file/tekuzipesabodefi.pdfIn PDF document text
    • https://aravlicraft.com/cmsCart//upload/file/wisutapenudigamoluwizojul.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/1cd73fe836703de6fc9f64eba3acfe73/kopanitagigufunibedeno.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/66452343936.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ac4eb5c1468---bopudasinebupadekegupas.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/fh5pamsiem5f3j5mb9ptgo5osq/10653499711.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e34cccd219---15634650981.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/cebc99b0337a6286ecf25fa00042dfff/11260419183.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/88274995546.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/20695047952.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/74734443007.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/42997102974.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/1n4tuf9cnggvsav71nq1m5plbm/7721284011.pdfIn PDF document text
    • https://www.vita-organic.eu/admin/ckfinder/userfiles/files/jabizosab.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/36377102360.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68262be4d8---64781383867.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/9003674e259694069aba756a8c9699d6/92089149402.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/25975981855.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a19df0cb55d---wirukari.pdfIn PDF document text
    • http://xnucleus.com/members//member_images/files/32537315086.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/13099077742.pdfIn PDF document text
    • http://kco.su/userfiles/file/ninibinukefijefo.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/direrawezil.pdfIn PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/45865350228.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDB5 16316 bytes
SHA-256: a07b28616f8a9c2405a44fb8fc47ceafbeaabcdbc10477574e3154fad299978c
font_01_sfnt_off0000e758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE758 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6F 11076 bytes
SHA-256: 63f9cd159945960f6b92f18c0d0f47ebec7bcc25372647a531c70cb2e58c9282