Malicious PDF — malware analysis report

Static analysis result for SHA-256 1614581170b67f12…

MALICIOUS

PDF

84.2 KB Created: 2021-09-06 03:32:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 49d04b536080274f3ed437549de6ec2c SHA-1: 8d361d18b610f33252628ed4f1755915cd0ef004 SHA-256: 1614581170b67f1280eb6195f9691aa95ffdfa1d95032a6d3fe7c4eae7e75d3f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the ML classifier's high confidence score indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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=defamation+and+freedom+of+speech+pdf PDF link annotation
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7c99210c249a6fb6afebcf8d3684f276/98303612788.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/majejifumajizireratenedi.pdfIn PDF document text
    • https://noblacklist.pro/web/img/podborky/files/daxejowesutixakafos.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160801f85ef963---89191111102.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/kedamudoki.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210708042834.pdfIn PDF document text
    • https://edukiya.com/wp-content/plugins/super-forms/uploads/php/files/edc8d924c61eced0c5cb669216a99bb9/wobarajunomavemerexenel.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ca5c1c17694---rimurolumizodo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/31da496d20875f0dd7f2f8c9af9182a5/60894635974.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/7ef15e3e11d3e0277b69368f22b06752/6521298119.pdfIn PDF document text
    • http://laulumaja.fi/ckfinder/userfiles/files/60698016944.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/78533bcf7d536aa6cd3d324a07f8313f/vedakovafosoruvufinolituz.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/140955398758.pdfIn PDF document text
    • http://besttailor.info/ckfinder/userfiles/files/49839671231.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609189d0bf536---liwuwasajebab.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/kofovenu.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/58170629514.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/bnbthoqgq3ldbu8a9572eild33/26449803889.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/9c105d4d38beef04d14b656979d17eec/32061642367.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/v09gg0tt5ij1c28g60ibkj55fn/66042003719.pdfIn PDF document text
    • https://psychologgia.pl/Upload/file/2654008613.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608af28bd1f3b---90261582101.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0038815f---bovusepawafetip.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_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 10840 bytes
SHA-256: 1709c1deafad4127df2b1bc1a0749ceac7e3172eddd02c581777f196d8272c18
font_01_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11671 17328 bytes
SHA-256: 7b57e8fc8d73d220cfb18afe065892397c55afa8f3cb26a85a65cd20b7c3281e

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