Malicious PDF — malware analysis report

Static analysis result for SHA-256 270ab64b42c9773f…

MALICIOUS

PDF

75.1 KB Created: 2021-09-06 12:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 551d4b711ddf25ba94b25c19b05e2bf0 SHA-1: eb7e5e2f60f94de0792aa6d995075c240f246cb1 SHA-256: 270ab64b42c9773fe25f7a7b9f8edebce877b484f92dd8188611e619d5482747
156 Risk Score

Malware Insights

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

The PDF file contains a link farm directing users to multiple external URLs, with several hosted on compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve further malicious content. The structure suggests an attempt to leverage SEO or disposable hosting to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://orderkiwicafe.com/uploads/files/19435353831.pdf In PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094041dd0be3---telesanilefura.pdfIn PDF document text
    • https://svarovanijelinek.cz/ckfinder/userfiles/files/26027606357.pdfIn PDF document text
    • http://caramelitos.sk/files/penumerapesololamas.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/93128901578.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/zuviwizapubatalepiwujof.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/47930739724.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/dd4ee9537f4c0a3d7b5f66a2b43d7e4a/37785539286.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/35979e94a5c937ff5d8d83b18dd8f7d5/37552684429.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/fowezalisimogodi.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad761baf90e---legudakozupovepazu.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754c10dc12f---4863472012.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/baxozasilimirivexaduxavob.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a037d714dc---xonomawasop.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/powanejadumalu.pdfIn PDF document text
    • http://cppzone.ru/users/blogs/file/20033685450.pdfIn PDF document text
    • https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/55a6a2991de2ea5f6d48fea95764a8fc/10068875957.pdfIn PDF document text
    • http://fkjz.cn/upload/files/2021/07/202107152013185122.pdfIn PDF document text
    • http://divyabodhanam.org/userfiles/file/87714648454.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///68123126737.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/begkuqp29ujd4febcplgk9r4i4/zulinatotepevaruwef.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/49345814824.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=love+from+the+very+hungry+caterpillar+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF60 11136 bytes
SHA-256: 679f609a83e803d4d8ae02b267c965e88955e2dbb97cf5a441986a056be6d002
font_01_sfnt_off0000d904.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD904 17696 bytes
SHA-256: 9fa06e698e5b418c626b07fc00e3d45077695620a67c7e7377ecd70570aa8034
font_02_sfnt_off000106f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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