Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d371b05b28b42b3…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 07:58:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2f72d4f57b46e11527b2fbbd59a21315 SHA-1: 9c8b4751a2c16d97e85de56eb34407ffc3ce58b7 SHA-256: 0d371b05b28b42b3f78c21b010b66829703834e1612d8a763985e3e79072ce5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm or phishing lure. The presence of external URI heuristics indicates the document attempts to redirect the user to external content, likely to download further malicious payloads or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://canoe.ro/Extras/ckfinder/userfiles/files/64693276802.pdf In PDF document text
    • http://candybeauty.vn/upload/files/didipazifika.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/34c6f538817294fd626e5236a448d563/4064434901.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/56834953456.pdfIn PDF document text
    • https://realschoolspirit.net/scauserfiles/files/supokofixebatub.pdfIn PDF document text
    • https://unosms.us/userfiles/file/pabukefedojiveruvi.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730bdc605de---40854269733.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/ziduvowozowobotas.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1608a364c3fefd---kijojarif.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/52133141266.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/3446034437.pdfIn PDF document text
    • http://skupka54.ru/upload/m/18854382956.pdfIn PDF document text
    • https://ceccarmaramures.ro/userfiles/file/85386592397.pdfIn PDF document text
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f778a835a3---kazes.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/bixizaradodizaga.pdfIn PDF document text
    • http://mrs724.ir/basefile/drtiketcom/files/68227827710.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/96990268282.pdfIn PDF document text
    • http://dogoxuavanay.vn/uploads/files/75693589241.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/e91f7c091cdb01a41bdd9af0f4a35c2e/nisivolidudoninuvajegaba.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b6687455cdf---mogexijonuzegorevibe.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/16ef03ea37b2659fa4856d9ef1eb8c55/kegiwenoboxuz.pdfIn PDF document text
    • http://cunningham-reunion.com/clients/7/73/7399477c88ef979e1ad3ac38e42cffcc/File/kobuvid.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=notifying+creditors+of+deathPDF 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_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 17864 bytes
SHA-256: 3b521ff0fd0d8e8c16703f1ed0aeacf895c35814e478c913800f53b95e31e7f1
font_01_sfnt_off0001101a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1101A 10800 bytes
SHA-256: 602671b9aad9623a88ea0703e0bbc6bae0434ae45312c21f03cdaeb36f007f87
font_02_sfnt_off000128c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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