Malicious PDF — malware analysis report

Static analysis result for SHA-256 49306112cfea3475…

MALICIOUS

PDF

81.1 KB Created: 2021-09-13 06:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7ebdc5ec8f9758e417a816174c25705b SHA-1: 75cfdc5ec30f80d957657e9aeecb4fd4cdb46142 SHA-256: 49306112cfea3475e67e726bc44b65f53bf6e2452de353fba2ce81b377cc1788
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing malware. While no scripts were explicitly extracted, the presence of many unknown URLs points towards an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://foodsafebox.com/ckfinder/userfiles/files/65878336277.pdf In PDF document text
    • http://theflowermaker.com/uploads/File/tugizokuduxuxugesazimu.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/tatuvube.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/5176190743.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/75621301002.pdfIn PDF document text
    • http://eot.mn/uploads/userfiles/files/69568099427.pdfIn PDF document text
    • https://jmcoverseaspvtltd.com/uploads/files/wajorikajapubel.pdfIn PDF document text
    • http://potya.com/49486328024.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1613ebf6ad7ce6---giwesevadexekem.pdfIn PDF document text
    • http://dralituncer.net/userfiles/file/kupifir.pdfIn PDF document text
    • https://bczenekar.hu/files/file/60298814252.pdfIn PDF document text
    • https://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/99258981739.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/75070526585.pdfIn PDF document text
    • http://dharmapuridiocese.com/svnprojects/DHD/Source/images/files/5032701221.pdfIn PDF document text
    • https://www.bramfordgc.co.uk/ckfinder/userfiles/files/59629017139.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/49684891720.pdfIn PDF document text
    • http://gtshotel.it/images/file/malogidasonel.pdfIn PDF document text
    • http://schokofontaenen.de/idata/zulux.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/dqg0rk7r81usm8b9u3780s21l3/fajakevisopukumel.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/28010050032.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/gb2lisqldcq1v4h2d7hhgrldro/77408894025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=dragon+city+unlimited+money+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_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f0e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E1 10996 bytes
SHA-256: 1ac24ccf917ba758328842954e34ad76aff4519bab11c24440ff5e99f01a277d
font_02_sfnt_off00010a33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A33 17264 bytes
SHA-256: f1f7558d1f6f1729c192d91bfa491a7eb2facc488a6bca8b69466e85db9c5bde

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