Malicious PDF — malware analysis report

Static analysis result for SHA-256 0da49d175ce69afe…

MALICIOUS

PDF

79.4 KB Created: 2021-09-15 16:00:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 3cd5567af3797eab1f16115b38bce40f SHA-1: 6072755049538b830e4bea38c943e3552e06ab84 SHA-256: 0da49d175ce69afe1abbcc0aeedfeb00b63e5fbd5f00ac483486caa8c45396f8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external PDF files, suggesting a link farm or redirection mechanism to distribute further malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a pattern of using disposable hosting for these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://lombardpruszkow.pl/local/userfiles/file/80477856338.pdf In PDF document text
    • http://oldadmin.k12cart.com/media/files/pewanakavisod.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/9884495486.pdfIn PDF document text
    • https://3drm.bg/uploads/pictures/files/gilolotuwetubesodebufa.pdfIn PDF document text
    • http://vivo-mebel.ru/upload/file/sebewizemivixipado.pdfIn PDF document text
    • https://gppacdatabase.net/userfiles/file/fadejijugabasivumes.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/22776058102.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/nosalizodepuvela.pdfIn PDF document text
    • https://pilot-nav.com/ckfinder/userfiles/files/48785680173.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/25707131200.pdfIn PDF document text
    • http://agt.es/files/galeria2/files/12728690219.pdfIn PDF document text
    • http://synergytaekwondo.com/click2buy_newp/userfiles/file/22909947623.pdfIn PDF document text
    • http://candientu24h.vn/webroot/img/files/82787431447.pdfIn PDF document text
    • https://eastmanllc.com/ckfinder/userfiles/files/25349623252.pdfIn PDF document text
    • http://chanakol.com/ckfinder/userfiles/files/85630386623.pdfIn PDF document text
    • https://www.marjojaspers.nl/ckfinder/userfiles/files/75057358817.pdfIn PDF document text
    • http://ural-resyrs.ru/data/file/bivagovomodoresexikana.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/jimepaxilo.pdfIn PDF document text
    • http://pushgroup.lv/userfiles/files/44881507783.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/tejanekapope.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/11934249735.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16136be14e17c8---gubenelaxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ear+scout+appPDF 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_off0000d455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD455 17624 bytes
SHA-256: 5b75351365e869e3809d248dc4966de907e945a96f423fe603690e33bd9bc1cc
font_01_sfnt_off0001020b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020B 10076 bytes
SHA-256: b74ae789358b0fa04e24dbaa89ace02fa49dc3308c90e8d37df4a9cd651f623c
font_02_sfnt_off000118a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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