Malicious PDF — malware analysis report

Static analysis result for SHA-256 8956874bf20b2294…

MALICIOUS

PDF

68.7 KB Created: 2021-10-01 01:57:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 062d9f566071cded7b61e42712959e1a SHA-1: 7b3c566c6fbcc2c766e1f37827e7745d7179f1b8 SHA-256: 8956874bf20b229435077504319c52a5384b1ecdbfd2e42a23cf9f05c0682a92
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detection as 'Pdf.Phishing.Trojan' further supports this. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence suggest malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ketchas.ru/uplcv?utm_term=download+ludo+king+apk+mod PDF link annotation
    • https://pasationtravellers.com/root/FCKeditor/file/56026933440.pdfIn PDF document text
    • https://rajakeempat.com/contents/files/pinanefux.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/rozil.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/xedijegefovowamewu.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/07125354769.pdfIn PDF document text
    • https://sahyadrisevasanstha.in/userfiles/file/44392208661.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/64369235359.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/xovajosoku.pdfIn PDF document text
    • https://aneri12.cz/res/file/gometerikuwutidizaki.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/lifikugepilixomuj.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/labazuzukidikaxuwa.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/27464020997.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/68084573272.pdfIn PDF document text
    • https://www.puskinas.lt/ckfinder/userfiles/files/sasosagusoviwedibal.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614b73f9d5ee6---81896929843.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/90726422361.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/56087612561.pdfIn PDF document text
    • https://radekslodkiewicz.pl/files/file/sataru.pdfIn PDF document text
    • http://napiarsaigh.com/images/84648780960.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec845ccc96---mibiluguwejodiwuvo.pdfIn PDF document text
    • https://soudurelausiere.ca/upload/editor/file/25942019922.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/mizerut.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB133 14520 bytes
SHA-256: 48d69ab8ae2b3d1db6447307691295635aacbc94aedb809913a86276aad37cdd
font_01_sfnt_off0000d5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5C1 10516 bytes
SHA-256: 87ced269cab620a955347582e061a18c6839c1b941711f93ca529fa30688ca18
font_02_sfnt_off0000ed69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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