Malicious PDF — malware analysis report

Static analysis result for SHA-256 afb3ee8b214df90f…

MALICIOUS

PDF

74.2 KB Created: 2021-06-30 23:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 26c31d470d27f78562d2e719ccfad573 SHA-1: 026a525a2016d6f3d5976deb388248bed1459fba SHA-256: afb3ee8b214df90f05616e61d9ee48eb0cdcdcb0f578bbea937f32a0598f0ab4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document contains numerous links pointing to compromised websites, many of which host other PDF files. The heuristic firings indicate this is a link farm designed to redirect users to potentially malicious content. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b3efcb5cfa9---83006395402.pdf In PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f657f131053ddf7f90363d43450ed2a2/ropegap.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/9c645f7491e068f6190f617b272e45f4/68829315347.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/3161902401.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4000bd5afb---1555920867.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/b27fe1bf98a8f31f0e6f2c601b174943/70165165455.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/00e1491b1f51aa0e93ab9b8bff6b5cac/gefalejesoluvefo.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/98fc0a468b4e2120a9dc584d8406c408/68388487209.pdfIn PDF document text
    • https://gerastar.com/userfiles/file/12821150210.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/90507502330.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac82b9aa7d0---wixel.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/3025699a6f2c8472d382532644ac28a3/46947920875.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/ng7968acqf8mk4qbqifujbuavm/tatafigew.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf0de7afe9---wixugexusemeril.pdfIn PDF document text
    • http://pnktools-th.org/ckfinder/userfiles/files/bukirulasezaloza.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/85hclbam90ofc9rm0ido1s5mnc/53298498075.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/28610744924.pdfIn PDF document text
    • http://sooclose.eu/upload/File/93695886021.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/2502e35ff9ec1f7d895e61d0e1e8b7b3/risodiluxob.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/parixo.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d07ddb26e10---22528594518.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/77889f8e7b9289866371a13b4f417ac7/65608844409.pdfIn PDF document text
    • https://108pizza.pl/uploads/userfiles/files/lozobu.pdfIn PDF document text
    • https://mytopics.it/uploads/file/gujexejufimexovavoputo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=15+rmb+to+usdPDF 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_off0000c05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC05C 16972 bytes
SHA-256: 2f59ec84e06cce7e70d298fd676ca97b3c7c94d2a15d23c796bd89bd856a26ae
font_01_sfnt_off0000ec94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AB 10204 bytes
SHA-256: 7431425900ebc3446c81bc6df2e4569f403d9db6c3b4910ba55722e2b7c72b5d

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