Malicious PDF — malware analysis report

Static analysis result for SHA-256 be083fc078c6a48e…

MALICIOUS

PDF

80.8 KB Created: 2021-09-11 08:29:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e9f529130331f158d663a14e1ebf0413 SHA-1: 53285950bc334991357acd97b57a0aeb17addbc3 SHA-256: be083fc078c6a48ec33ca9c577e81ecbdfec546708e6ceec463f506a11629ab0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is designed as a link farm, likely to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://izhar-energy.com/userfiles/file/21449385103.pdf In PDF document text
    • http://dep14kirov.ru/userfiles/file/newujemifezilafelekil.pdfIn PDF document text
    • http://batterseataxi.com/survey/userfiles/files/7751001750.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/joluxowela.pdfIn PDF document text
    • https://festacontinua.it/public/file/vegofagigawetoge.pdfIn PDF document text
    • http://1night2day.com/ckupload/files/17840571578.pdfIn PDF document text
    • https://inprovituruguay.com/ckfinder/userfiles/files/wogefozu.pdfIn PDF document text
    • http://gryfarmerskie.pl/pliki_wyswig/files/logirefadolovezirov.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/riwiwugulevibefon.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/45222072996.pdfIn PDF document text
    • http://thaifilmind.com/UserFiles/file/84515188503.pdfIn PDF document text
    • http://www.centralperdana.com/file/6036765905.pdfIn PDF document text
    • http://dunakeszi.varosom.hu/userfiles/files/bikosimapidajowos.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/42980616047.pdfIn PDF document text
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/64350032265.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/88085613413.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/vuzegorilulezijaxiwugasoz.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/48367000466.pdfIn PDF document text
    • http://fotografieindex.nl/images/uploads/19009864433.pdfIn PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/25388298241.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/39845967478.pdfIn PDF document text
    • http://swiss-ex.com/images/blog/file/46275836245.pdfIn PDF document text
    • https://weborder.cloud/userfiles/file///tijerumituto.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=san+andreas+money+cheat+codePDF 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_off0000d7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D9 17480 bytes
SHA-256: f877f9dce4cc063739e00386e5eac9df09bc3fa0b4073d86105c49d310354bf4
font_01_sfnt_off00010520.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10520 10684 bytes
SHA-256: 9026d6f7d45306d6246b053ef251e003758e0f80a46ba5d487d2fd67c130693d
font_02_sfnt_off00011d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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