Malicious PDF — malware analysis report

Static analysis result for SHA-256 000375573406a804…

MALICIOUS

PDF

104.6 KB Created: 2021-07-03 00:00:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: fc86c85da0ed8f3ea93386b4c4513efe SHA-1: f88b43124aa91ebfe8d27501a143cb3769df40e7 SHA-256: 000375573406a804ec0c0054db330b5fbc88bac2ed370dd5a898c55d2de7dbc7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress upload directories and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9682

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.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/e70c725cd5067706d5783e29e1a1e32b/69269642972.pdf In PDF document text
    • http://afgventuregroup.com/cfiles/file/jaruguvajejunige.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160830d1b28365---rarujumufiresurudisalame.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609863fb8a3df---11295547563.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c415fbc8665---69657019823.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/52862972678.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/31ecd0909a735bf41f868326cf4e9091/96860998283.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607214e14a340---75728894187.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160df7e4eacc29---83985951278.pdfIn PDF document text
    • https://gccpay.net/wp-content/plugins/super-forms/uploads/php/files/2487a5e745a7b18df9d835740cde471e/bokipavojazada.pdfIn PDF document text
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/25705c94ccc03da2bc12cc41f9b64b50/xiwibukazudalomotox.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4c6861deca---lisopigususonufulapadutu.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/20798738998.pdfIn PDF document text
    • https://tasleemdubai.com/userfiles/files/56115481384.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c13e982c228---sonapogefodejame.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/39520629299.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb9210fd0a---zuzoxesexigaseledibukov.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/d722394094862541651367f9bcee9d7c/junibizonowadupumad.pdfIn PDF document text
    • http://cncforginghammer.com/d/files/44253813459.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074bac8761a5---lerogesededujolorujelaxi.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/9aa186461fc6db7ef2400db6db9809a3/zodunifalagexitanumezadem.pdfIn PDF document text
    • http://alituncer.com/userfiles/file/14126489109.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/a586026b111426475172f8c3162618da/jaminisexodixojamibu.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607331174718e---nogatux.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/aisnvser2d2rgofqmlgdvraqq3/36013561319.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=concepts+and+comments+4+pdf+freePDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/kenamefaj.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD5 22768 bytes
SHA-256: fcd94865169311dc17a0c07f28a4e7c60e8d2f9fe2b74170f84268150b2a4559
font_01_sfnt_off00014ab9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000162d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162D0 10752 bytes
SHA-256: 31061d3fb43bfd334638e0b8ca1ee43bc4a6fd5d1fd0e2db355783b625801fd2
font_03_sfnt_off00017b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B90 16924 bytes
SHA-256: 3b5dba0d3d9768b0066b038c827bfcff2bb9f629a2f3bdc1501a44e20fbb8827

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