Malicious PDF — malware analysis report

Static analysis result for SHA-256 f46c0ed1f5d4c68b…

MALICIOUS

PDF

68.9 KB Created: 2021-09-07 10:55:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dc5bec68e9c775101274c56ffc48d768 SHA-1: 7f1e9ee278687f539999cd03a191dec712a7ff4f SHA-256: f46c0ed1f5d4c68bdbe3fcee7f0e42f69f73757c0bc73c347cd9c9d2ddbd210c
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external websites, some hosted on compromised WordPress installations. The presence of numerous URLs suggests an attempt to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://archism.ru/uplcv?utm_term=livro+de+receitas+low+carb+gratis+pdf PDF link annotation
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/57508684884.pdfIn PDF document text
    • https://mimpishio1bet.com/contents//files/judaxetawozokamu.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/0b09e1d6ad09ec2e6c61e8c2956a08d6/30755502287.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/4bc36d868807d3b388062de36c6dca6d/zivezagewumetogalenep.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/1f5b953ea92c85286257503b6fa72ad8/botovewuzufemulabis.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/dneb24tdb8adaa2kd8cmgf613h/kibupubeko.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16073d41b5b52d---libakosabapumuwurejuguf.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/161321b0b8caac---5022011803.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/fb613c68edd62eb70b5d83aee69967df/41398317192.pdfIn PDF document text
    • https://marbeyoyun.com/calisma2/files/uploads/nojewatiwajalez.pdfIn PDF document text
    • http://masonhn.com/d/files/toren.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/8019469432.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/kazifovenumosapujijal.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b96cb83e24---86774234285.pdfIn PDF document text
    • http://yomamasushitogo.com/uploads/files/51046691004.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/793c2ceed0057293e36f795b0b3cd481/bepewozufu.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb92067c36---38050113684.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/mjilfeorndg8nuk8dlssdvk00f/vovirefoto.pdfIn PDF document text
    • http://abnicum.com/files/file/kedafufiperuwokezevox.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/volozataxiwikolobumej.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/grv7p6djjtb92rafnre0nfnrak/35078704745.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/39127312337.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_off0000b0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A6 10940 bytes
SHA-256: 1aa30967eb537c87b6a179f26532ea2af0afb5b18ca20f4a6389d1962aeceb0c
font_01_sfnt_off0000c9c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C9 14532 bytes
SHA-256: 57ea24a43b7e9bf0adfe00795d50cc79a1ff34a560e5e96e67820b3e97093c3c
font_02_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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