Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fe910603e779183…

MALICIOUS

PDF

81.9 KB Created: 2021-09-22 09:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9a986606d537b5b67508e67f918edeca SHA-1: bd7ad95b6441255fd55e9dfe9ee7c89eba10d865 SHA-256: 2fe910603e779183ae0d7d426a272e7dbcbdd25aad36cdfc3734d173e701e5ed
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 a link farm, suggesting a phishing or malware distribution scheme. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic specifically flags this behavior, indicating a tactic to obscure the true destination or host a large number of malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://aesg2edcv.handylover.com/upload/files/loxexetep.pdf In PDF document text
    • https://pbchistoryonline.org/uploads/file/50657741540.pdfIn PDF document text
    • http://asfalon.com/__files/file/80897104587.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/89655303302.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/30004761577.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/fusaf.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/fidixirewogegarimine.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/saxuvelekezolomixenubinaz.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210922141316816.pdfIn PDF document text
    • https://twinslock.com/locktactyuma/userfiles/file/98358013796.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/5a4abaf9618388e10f53638e2c4dc249/42109077019.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/foxotajitolarewom.pdfIn PDF document text
    • http://ttmplus.com/userfiles/files/ruxokudilepaluw.pdfIn PDF document text
    • http://ideal-site.ru/userfiles/file/torutotemedewolep.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1632291247.pdfIn PDF document text
    • http://kossuthdigisuli.hu/userfiles/file/50875845627.pdfIn PDF document text
    • https://bibliotheque-des-arts.com/ckfinder/userfiles/files/45794960451.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/wamunowisulametenugivepi.pdfIn PDF document text
    • http://businessnavigator.in/ckeditor/uploads/files/21840614748.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a476898e33---50697753892.pdfIn PDF document text
    • https://millvalley.com/wysiwygfiles/file/94140004074.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/popopar.pdfIn PDF document text
    • https://igk-lilienthal.de/downloads/88524826631.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=wonder+woman+hd+onlinePDF 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_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 19356 bytes
SHA-256: ec37626560f7d0cbc57d9ddd632d4b55b2d7247e83419dd5d2b41d144ee0e21c
font_02_sfnt_off0001237a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237A 10328 bytes
SHA-256: 77aceac42fb9e88d272eca0c4e1dcd0bb064ba669e24bbd41f548e4c8341a803

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