Malicious PDF — malware analysis report

Static analysis result for SHA-256 0901f45a55eabc23…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 19:04:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 71869abbe49405e2cf7c4c2089443445 SHA-1: d52147dd3d75bcf4fb91b9e5a9fca2af25f82d23 SHA-256: 0901f45a55eabc23b067e126a36ec80eb60eb53a114438d14cbb89f062e416e2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a probable phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://medvor.ru/uplcv?utm_term=kingsman+streaming+1 PDF link annotation
    • https://indoshaolinkungfusociety.com/ckfinder/userfiles/files/50803691538.pdfIn PDF document text
    • http://radecznica.pl/userfiles/file/nujelezinepiwawa.pdfIn PDF document text
    • https://madame-tina.com/ckfinder/userfiles/files/81501740266.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/desovapufijif.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/botilulidutikiwegunetup.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/68144009913.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/voxiloxoridawetatafoluk.pdfIn PDF document text
    • http://gdlejia.com/uploadfile/files/20210905_131045.pdfIn PDF document text
    • http://dxline.eu/userfiles/file/kanimafatamazepif.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/84985352444.pdfIn PDF document text
    • http://jszl-rolls.com/filespath/files/20210901191329.pdfIn PDF document text
    • http://llux.vn/uploads/files/44740564946.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16142fb4b21208---54070847017.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/jepotezaza.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16145e9fb9dd9c---kokagaxibabegibolo.pdfIn PDF document text
    • http://tpt.taipei/asset/uploads/files/93365446513.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/zutosovorepopekowomefip.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/52881166274.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/30363722276.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/kimofopemozudu.pdfIn PDF document text
    • https://ip-pharma.net/data/files/17831271526.pdfIn PDF document text
    • http://cavusofis.com/images_upload/files/gikewolutoxawixeworom.pdfIn PDF document text
    • http://jjburgerut.com/uploads/files/69360503167.pdfIn PDF document text
    • http://strandedtattoo.net/file/susumezawupi.pdfIn PDF document text
    • http://autodilygood.cz/files/file/79539153177.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_off0000d8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E9 17844 bytes
SHA-256: f1ad23717a038c4caa39195e61308cae258e285da6d1db26eb473b1458a7f21f
font_01_sfnt_off0001073e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1073E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F55 10328 bytes
SHA-256: 0c414e59d1e4ff3ff6175def0e67cb0fe81c87007bb4f7b8778b3cd9f99c628f

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