Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff9e1ed8892044b…

MALICIOUS

PDF

89.1 KB Created: 2021-06-06 19:22:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c8a6f7cec72f6fedabf7d6f15708493d SHA-1: de21ce1276027b31b730eff96853219a19d1cb14 SHA-256: 9ff9e1ed8892044b6e33f604f108cc4445c32b47d2338dd296e875b773ed703e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a link farm pointing to multiple compromised WordPress sites, likely serving as a distribution point for further malicious content. The embedded URLs suggest a lure related to movie downloads, a common tactic for phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://philabc.ru/uplcv?utm_term=kabir+singh+movie+download+filmyzilla.vin PDF link annotation
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160774a46b2874---sofimodasezaxeweg.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/15759002448.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/zunanesem.pdfIn PDF document text
    • http://jar-ted.pl/file/rorinopoxikudesoxazavokud.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959c5dabd13---woner.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/pujukalulonu.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/kixizikonudinemevufexelo.pdfIn PDF document text
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/cc5479101abc00ec7ef863f74b836c32/lifomapomuwote.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/98701333447.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/da70a7e156c8ae44908a7bc79cede60f/84320611603.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/831ea335e6547cfef5fd524f849fbffe/51215469404.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bd5019a3e---68664287233.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/sunipavubivowi.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/99301e8c66b3b9871bd62f8a9761ed96/10779560430.pdfIn PDF document text
    • https://corghialberti.it/file/51670536361.pdfIn PDF document text
    • http://bhs-class1957.com/clients/35434/File/tuzijisegam.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC79 5764 bytes
SHA-256: c370d87ed77fa52306c45e2e293ede7e881fa5a36f71177398e47595ae223773
font_01_sfnt_off0001000f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1000F 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00010b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B72 10416 bytes
SHA-256: f480620a6329890ce786a18fd8b756d2c0568c4a25bbc69e79722cb064dab5b6
font_03_sfnt_off00012f75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F75 12708 bytes
SHA-256: 15ecdc77de16f54436f49889539b34813565dc387c7205918bb9fdace31cf6ff