Malicious PDF — malware analysis report

Static analysis result for SHA-256 32559e5239e3290a…

MALICIOUS

PDF

72.3 KB Created: 2021-09-12 20:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 244fb5148e8e6d91ead1ac4af7a82fa2 SHA-1: 295d089691338226b74de8bb7f387514987123d1 SHA-256: 32559e5239e3290a68187d8c973579f30dfe03471ff9114efebbf7778d3017fe
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to disposable domains, characteristic of a link farm used for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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 https://archism.ru/uplcv?utm_term=kratos+on+throne PDF link annotation
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d43f5ee314---72214468440.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/57355040336.pdfIn PDF document text
    • https://ghnservizi.com/file/wowalubapuwekuli.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/kuxejizakekumewiji.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/lijenududujisokivo.pdfIn PDF document text
    • http://studiotipaldo.com/userfiles/files/lemal.pdfIn PDF document text
    • https://renhedc.com/uploads/files/202109030735392136.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/pugorazelexil.pdfIn PDF document text
    • http://nofatrans-int.com/userfiles/file/jomoxedekovikadexapaxe.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/9046225247.pdfIn PDF document text
    • http://colleges-in-tamilnadu.com/FCKeditor/userfiles/file/59463675066.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/buvezini.pdfIn PDF document text
    • http://ciba.lv/uploaded/file/sadajaba.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/pigokije.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/41160977744.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365581ac24a---belamalefiguzuduvavipev.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/24126256583.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/21472005924.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210912110935_1633990637.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/20384703079.pdfIn PDF document text
    • http://asiadomainstore.com/userfiles/file/kuzukem.pdfIn PDF document text
    • https://galaxytraining.examinationonline.com/files/jipalizo.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_off0000bad7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAD7 16692 bytes
SHA-256: 9d6b76d7a8e24c70e3a69aadaeb1137ff7fd4c71c7fdeb67f106555e60772aec
font_01_sfnt_off0000e5ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fdc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDC2 10056 bytes
SHA-256: cd43b2ac98d9c6b054dc86ffbb5b7432f6fc23dad5bcc5114419f3220360cc63

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