Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5b4e9780f0abd1d…

MALICIOUS

PDF

67.8 KB Created: 2021-09-10 13:22:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f23b31f58c1d996d142525b747f9daa0 SHA-1: a0d1ffe2af416270e65bdb7b7734b3772babba96 SHA-256: f5b4e9780f0abd1da2fdd6388419b222ecab04841e0d109811d0b99ca31ef805
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many pointing to disposable domains or link farms, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely related to T1566.001 (Spearphishing Attachment) due to its document format.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3fa7871362ba14405366d3d30ee87328/xuwagogeni.pdf In PDF document text
    • http://olymp-kiev.com/temp/fckeditor/file/67770077203.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b1f911a92---rozekivodo.pdfIn PDF document text
    • http://asja.ua/userfiles/file/32615263011.pdfIn PDF document text
    • http://seibyou-koujien.com/files/files/viduxotajikitidomodijim.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/tuwutorazewigiwixujavamil.pdfIn PDF document text
    • http://osteriadelcampanile.com/userfiles/files/fekaw.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/tapoxozu.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/54875410368.pdfIn PDF document text
    • https://kozhikodedeaf.org/admin/my_files/file/jewebo.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/54900835687.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/50223476105.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/puraxuxaweziwotovofowiguv.pdfIn PDF document text
    • http://postelezmasivu-brno.com/ckfinder/userfiles/files/wusemezifutis.pdfIn PDF document text
    • https://khogiaydantuonghanquoc.com/images/news/file/49598492226.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/zusuno.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/69159304104.pdfIn PDF document text
    • https://tavcam.com/upload/ckfinder/files/34455838239.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210901210321649.pdfIn PDF document text
    • https://ikansambel.com/contents/files/26182644005.pdfIn PDF document text
    • https://ka-base.no/images_content/file/tafegaburotak.pdfIn PDF document text
    • https://gelblighting.com/userfiles/files/varuwome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=pro+feel+golf+mod+apkPDF 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_off0000ac41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC453 15496 bytes
SHA-256: 6af3e895c35dfdf91d5b09335169f06ea328400077aa7088a38f6d60282216dd
font_02_sfnt_off0000ea8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8E 10472 bytes
SHA-256: 2163ee968281ee19d18d4b39ec52874757a5287a723a4437dc9cb0cee29a4563

Open this report in the interactive analyzer, or submit your own file for analysis.