Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a54e474eeca0c3…

MALICIOUS

PDF

71.2 KB Created: 2021-09-11 02:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7058da8aac28b3aa7bbec2b69f4565de SHA-1: d28cfcb6daf3e497073578596f455e9196a9e89f SHA-256: e8a54e474eeca0c37bab9ac32050089d2d19b6ccc30202e30cd970443b167699
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using link farms on potentially untrustworthy domains, suggesting an attempt to redirect users to malicious content. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for exploitation in PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://haiqi-machine.com/d/files/lagesilaril.pdf In PDF document text
    • http://denprokhorov.ru/images/file/laroligigekisipem.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd3da46cf9---zesarovusijabivujudore.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/1d4d56b626dfacfc337fb4cf1cbd35b1/ligomawukaridesita.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/25132950524.pdfIn PDF document text
    • http://autosvilar.com/uploads/ckfinder/files/tebometorazelitafe.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/53011323889.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/rakevipatofokebadijolukep.pdfIn PDF document text
    • https://bliznacite.dvsportbg.com/files/15041390788.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/muzazamirodememev.pdfIn PDF document text
    • https://crmsaas.dswip.com/ci/userfiles/files/rawewinawame.pdfIn PDF document text
    • http://hwayinn.com/image/files/20210906_133325.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/f3e287a7d6304b884f76206f150aa082/34051493046.pdfIn PDF document text
    • http://kartelabasligi.com/images_upload/files/37926375867.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/86085488296.pdfIn PDF document text
    • http://redeyeldn.com/userfiles/file/geledopirajinokakiz.pdfIn PDF document text
    • http://rothemtour.com/FileData/ckfinder/files/20210908_DA9D99A08054B226.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/lopotikosedugoforapovaxe.pdfIn PDF document text
    • https://asmitahrgroup.com/ckfinder/userfiles/files/96492802174.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/95467998001.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/14512202616.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1613391e5b4bf6---kazasemu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=star+iptv+apkPDF 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_off0000b6cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEDE 16716 bytes
SHA-256: 4b017c078f0fd63c07072a9198bacbd87256eeb20290e6a7fcf42c66885d5292
font_02_sfnt_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 9908 bytes
SHA-256: ded8ddb1ac557a3f06117e612397fb0591ca1c5ac80b21fde40f023c1ca2355c

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