Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5065a08ab671a1e…

MALICIOUS

PDF

81.1 KB Created: 2021-02-11 07:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9d89cd2c4a9a2b785d4bce35b4cc141b SHA-1: 96911264e0648420a99aa3a92c8cc36ef3c2ea7f SHA-256: e5065a08ab671a1e535a60ae0fcf822e11659dda5a797ea13b200341d5a90e73
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious documents designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/aws?utm_term=viber+love+stickers+free PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5fcd313642d42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493579/normal_6000ae905c249.pdfIn PDF document text
    • https://finiruxadaral.weebly.com/uploads/1/3/2/6/132680938/bogebi.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/burger_king_grilled_chicken_sandwich_nutrition_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413968/normal_6024637b61ca0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_601105b4d332f.pdfIn PDF document text
    • http://gapuzenum.22web.org/engaged_in_spanish_formal.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/hgfjfgg/batogijasonulujinewag.pdfIn PDF document text
    • http://puwonasomoso.22web.org/akatsuki_no_requiem_piano_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/taduzotul/zmjhgeL/5526847378.pdfIn PDF document text
    • https://cdn.sqhk.co/bozogekeji/hjOiggc/head_basketball_download_mac.pdfIn PDF document text
    • https://cdn.sqhk.co/gozawelesutu/eigQlif/ww2_air_games_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://parubixus.rf.gd/template_website_bootstrap_news.pdfIn PDF document text
    • http://kajoxuf.epizy.com/auditor_general_report_2018_ghana.pdfIn PDF document text
    • http://muxolisakij.epizy.com/jotituzelerixebi.pdfIn PDF document text
    • http://saponasikaxugab.epizy.com/64498332340.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE10B 4896 bytes
SHA-256: cdd3ebd9d84db2e36ab8a4a27e99b173023381a7d59da31c8b85781dd571d28f
font_01_sfnt_off0000f1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D4 11692 bytes
SHA-256: 781a67f5456f300b81a1f163ea05db783e9a9b79d1a3b4a15c2f7d34609de85f
font_02_sfnt_off00011954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11954 16444 bytes
SHA-256: 3175b01a6d47688e2e3e48d5e88dac485f0053d9b270d938f90ca58da7666114
font_03_sfnt_off00012f6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6C 1736 bytes
SHA-256: 1648accd5638f26481c437d0e436fdfb03edab78dab75f4e73239278c8cddc19

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