Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f56b6eddb2e534…

MALICIOUS

PDF

86.0 KB Created: 2021-09-08 04:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1adc49dbc38eb1bf7ef8772bcbc68deb SHA-1: 1b1253a63c79e5fa026ceac7bc78e6a4e04620f2 SHA-256: 01f56b6eddb2e5340e6be7f215d0165e0ca2c050e7e5f9a96781bbb1cc94dfdc
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links to external websites, many of which appear to be hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The presence of multiple PDF_URI and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a strong intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/3r8slttiq3fp75hk15boitcfm8/15209954284.pdf In PDF document text
    • http://ewtch.com/upload/files/97149857217.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805c1a2378d---jiditexifegenate.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/tupim.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/32157882191.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088242293034---botenuk.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/musatowofasubimuvukene.pdfIn PDF document text
    • https://avgdesign.com/userfiles/file/83322939190.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/ltoj24e3cigpu1prp8ho6e7lhd/45707398864.pdfIn PDF document text
    • https://magazinul-de-instalatii-sanitare.ro/app/webroot/files/userfiles/files/46057680687.pdfIn PDF document text
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ae372a8fa2---59214522612.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/01b1f05e80e744b7956d5b09eb048d8a/nuviviligumok.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/sivusejatu.pdfIn PDF document text
    • https://tangentemag.com/img/file/savevajafokaxenigasebatu.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/mofoworuxubokinivo.pdfIn PDF document text
    • http://etkindenetim.com/resimler/files/59281720369.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/netomu.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/jovinulerufefufo.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/89000259831.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/6590311785.pdfIn PDF document text
    • http://evola.it/userfiles/files/zodugebodu.pdfIn PDF document text
    • http://fields-on-earth.com/27069184577.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/nuniwesewurejosomoxeger.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=frontend+architecture+for+design+systems+pdf+downloadPDF 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_off0000e73b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73B 18320 bytes
SHA-256: f88b0f6384344a2a0b91b5449d33173ddaabd7857168e9dc6ed183d07277a84f
font_01_sfnt_off00011777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11777 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8E 11344 bytes
SHA-256: 28d302bbd914aa28d3d570511de0e14a1f32b26898bc390c6a5a6503b5b62a6d

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