Malicious PDF — malware analysis report

Static analysis result for SHA-256 01e9130ab8fcc6c7…

MALICIOUS

PDF

79.6 KB Created: 2021-09-08 10:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e8b5f7eb2696a7d280dc2763284b8df0 SHA-1: 4a9ab958ab0978b869d0878d1103ca7a6c20f940 SHA-256: 01e9130ab8fcc6c71bed28c3bba330e5ee569851e64bafd94f3f59cdc3855b85
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous URLs and the nature of the heuristics point towards the document being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=manual+de+taller+toyota+yaris+2015+pdf PDF link annotation
    • http://cesnek-vysocina.cz/UserFiles/File/kedutejovawalifo.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/45405175636.pdfIn PDF document text
    • http://st03.it/userfiles/files/92817381588.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/0462d6b7efeb06d14db76fccaa48aa45/liganedadogewegonanos.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/f02f5cec5adfac2d11157f6d62fde1aa/zinamiwaguluwivixub.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3453d5ee79---josibowefigofoval.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/hsacohshmk80l098jv600ad8m5/kotatekidilorim.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d22d0877e2---lobavodemupexugalovijudas.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/siwawivewiwut.pdfIn PDF document text
    • http://xibuhuanyu.com/filespath/files/20210809103153.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087dffbc2839---rakoginulilamajo.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7ba75106b---nanunofamodu.pdfIn PDF document text
    • https://bajrahrs.com/userfiles/file/79622214739.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/42059820204.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/f2edea29de788174407da70265675fee/5251540673.pdfIn PDF document text
    • http://clinicoral.com/img/userfiles/files/besugesajuru.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086174385f4f---lufopilawu.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afc94a8f22---61477895913.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/jj7lbvvjksa16cqc3s9gmpme71/toxekidu.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/d3c9dbd6faa4089864b8694c2a18aa9b/toporowit.pdfIn PDF document text
    • https://lesartsdansmonjardin.com/userfiles/file/20210906100815.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/vasuxitifogaki.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/40106833809.pdfIn PDF document text
    • https://pesonabali.dswip.com/ci/userfiles/files/kidik.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_off0000d058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD058 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86F 11124 bytes
SHA-256: 8ad3098b41ccf214ffb74c6b0773c85bfee5fe0070bd08f38b8c615cc3f4024c
font_02_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 17576 bytes
SHA-256: 9630f851e87e9fb0317e45ab731f2fb02ec6fcab78a6397302698439855deb6e

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