Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3801b3c62947f8a…

MALICIOUS

PDF

81.8 KB Created: 2021-09-15 14:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1eedbda0a696e310b1779e5192064f23 SHA-1: a7220b1a5296991b7d7aced0c4ed2e9c15fe8ebc SHA-256: f3801b3c62947f8aabdde9db7d722168919e0c9c51a0ab94d1b495ac0a347c2e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm designed to redirect users. The presence of 'utm_term_redirector=True' in one of the URLs further supports this, indicating a redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://www.offshoreyachts.net/web_upload/editor/files/wutinitoburadovekesorun.pdf In PDF document text
    • https://premiersuli.hu/files/files/85123323960.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/kejuzogo.pdfIn PDF document text
    • https://indiansabroad.uk/userfiles/file/3973405453.pdfIn PDF document text
    • http://peoplefoster.com/pliki/50599116525.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/83610433615.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/68087807943.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/pixokoxigopogerofigeg.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/85726347582.pdfIn PDF document text
    • http://maychebiengoduykhuong.com/media/ftp/file/refuwefegoxodiva.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/zodomapisikixakokijofupez.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/99685643387.pdfIn PDF document text
    • http://idealthailand.com/file_media/file_image/file/58571771492.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/71650653358.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613667474c281---zataripuk.pdfIn PDF document text
    • http://nandishoverseas.com/UserFiles/File/36284528187.pdfIn PDF document text
    • https://adesso-moosburg.de/images/file/gukafugexug.pdfIn PDF document text
    • https://lawina-radom.pl/files/file/73567075335.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/dupefazisilotiropo.pdfIn PDF document text
    • https://cs-nippon-cp.com/mailmagazine/upload/files/kanevufisasub.pdfIn PDF document text
    • https://brs.jo/userfiles/files/fefiveseligidirujoredi.pdfIn PDF document text
    • http://paradisetnl.com/FileData/ckfinder/files/20210905_7EB0A8540B9279F6.pdfIn PDF document text
    • http://alarm.pl/userfiles/file/mufozifuxumu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=bowling+crew+mod+apk+downloadPDF 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_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 17300 bytes
SHA-256: 339e48c2c219bf4fd64919ff1465471ab2fb210a35a022897a1bc7bc19f9aa12
font_01_sfnt_off00010890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10890 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A7 10820 bytes
SHA-256: 33f83b95676d78aa1c88714686d7e2a150b4071b8f33a3f96be1e5778e1f009c

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