Malicious PDF — malware analysis report

Static analysis result for SHA-256 00a9f9d1569b929d…

MALICIOUS

PDF

89.4 KB Created: 2021-09-02 02:56:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 12ade7d2af42c9f88e62da69bdd3c7a9 SHA-1: b4aa44b7c70f6a0df878bb7105ebc5e66b28ece6 SHA-256: 00a9f9d1569b929d5df0bed703c30bdc3550fd791c1c46e531a1c06b49cffcec
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external domains, many of which appear to be part of a link farm hosted on compromised CMS platforms or disposable hosting. The heuristic 'SE_URGENCY_LURE' indicates the document likely uses urgent language to prompt user interaction. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • 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 https://smidgel.ru/uplcv?utm_term=bethpage+24+hour+customer+service PDF link annotation
    • http://shop-cartuning.pl/userfiles/file/73121847602.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/53074268683c79f50cfe6bdb5ed6eff9/lofuwa.pdfIn PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/37521092670.pdfIn PDF document text
    • http://buchtel1967.com/clients/26382/File/turezuririsobijafarebivif.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/42664006926.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/kutimezetil.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/17417988107.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/77237023221.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/foxeniruluxus.pdfIn PDF document text
    • http://hanifeugur.com/image/files/80365309210.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/o0b0sbfdce8b89p5tmnuqpnava/rarude.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/81053254921.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/5rfcsjmmps7878aoe0538c63bv/30691056150.pdfIn PDF document text
    • http://physocare.com/Images_upload/files/gazivarexigob.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073fd900574a---95580136041.pdfIn PDF document text
    • https://tavio.ru/files/file/12271528799.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8867b503---temibuwabuna.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3fb836156---mejixivamexexazoki.pdfIn PDF document text
    • http://ristorantebiscione.com/userfiles/files/15818712180.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/9bf89fc4af49b96060d3b2db9bdb2c8d/24557229079.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/8q8mraeksa6kj70vv68i601ap7/wajuwuzivadaluvujapuwone.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1610d683eb4263---nunufagoxuzagorepigaxov.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/sf01fja5ndon6q7hgq0r3k326k/43062474842.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/tinonekewixesularilot.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_off0000f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF603 11088 bytes
SHA-256: 3b39b8ff810cbb9a9a4120df844d4de870d9b83b05529610661c599e1b974eb7
font_01_sfnt_off00011014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11014 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12826 17908 bytes
SHA-256: 7f09ba9f23cff88cb3138cd0eff8eaaf81580aaeb4334e207bc962a7ac176a13

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