Malicious PDF — malware analysis report

Static analysis result for SHA-256 300d430b9affe5cf…

MALICIOUS

PDF

94.3 KB Created: 2021-10-01 22:48:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 73c33a1dbb7141025a8ae0bf983baa1d SHA-1: 7c863236fdcfb4aae8452d762f8ffde3d51876ea SHA-256: 300d430b9affe5cf298a8b514021e7ebf98a70270e5e5e7b96dc5c267ebd4b4d
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. Numerous embedded URLs and link farms point to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The document body is unreadable, but the heuristics and URLs strongly indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pixomot.ru/uplcv?utm_term=coti+galpo+bangla PDF link annotation
    • http://keyflounge.nl/userfiles/file/zeledetewudesanizarupe.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/92001818974.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/bogol.pdfIn PDF document text
    • http://aa-nusd.jp/wulutagajobajim.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/dufidaporawazodefetubo.pdfIn PDF document text
    • http://dfanchem.com/upload/files/totivureloreraditununi.pdfIn PDF document text
    • http://montpellier-businessplan.com/mbp/upload/images/images/upload/ckfinder/144070384.pdfIn PDF document text
    • https://unitytradefze.com/ckfinder/userfiles/files/gitinufevatigigegixexa.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/zugul.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/cd3330621e1808a8f85ca897c5318f11/22262162502.pdfIn PDF document text
    • https://trainova.com/userfiles/file/81127167207.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/a1d45597e1aeb6c17c128c59fe3c9fe0/32405331638.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/nuxenenunuxitimolofe.pdfIn PDF document text
    • http://www.sloepverhuur-debiesbosch.nl/upload/files/38479773933.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/87033117192.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614e268de3fd0---wosoxoxiselejubala.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/varojopimoj.pdfIn PDF document text
    • http://wtmongolia.com/materials/file/40460144489.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/rakowejilabulurumunojere.pdfIn PDF document text
    • http://trevelsi.ru/ckfinder/userfiles/files/88583169101.pdfIn PDF document text
    • http://giaydantuongphongkhach.net/images/news/file/xuxojizaz.pdfIn PDF document text
    • http://cegled.varosom.hu/userfiles/files/zufatenojo.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/pajodazedediludigafenu.pdfIn PDF document text
    • https://bagstyle.uz/images/file/35190072738.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://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_off0000ede3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FA 10200 bytes
SHA-256: ade6d554b0f905e700ece9d5c453451b2b5f220d983260936776a149ef68bcd8
font_02_sfnt_off00011cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB3 21788 bytes
SHA-256: 89e7b0918310138c79ccc468dc4c797adff112c76357159fc0e22d16d69a8709
font_03_sfnt_off000154f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154F8 16364 bytes
SHA-256: 0feca032aed51f046e9caa67816571eb77e5146b836e7fe6a16dc15a194388f8

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