Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2062220f5825e85…

MALICIOUS

PDF

74.2 KB Created: 2021-09-16 03:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4f67d4d95ddb9207c2e0bc8216bc075a SHA-1: 3554937c80479b9ca3c6c52d39ab522692308d16 SHA-256: d2062220f5825e856730e84c354d26c8bd2bc93b23afff92be2485fcf6b5c1c0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm. The presence of these URLs and the heuristic indicating a link farm suggest the primary purpose is to redirect users to potentially harmful content or facilitate SEO manipulation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://liur-krd.ru/userfiles/file/93654123536.pdf In PDF document text
    • http://valsadindustries.com/userfiles/file/kemazawiligefelora.pdfIn PDF document text
    • http://formpart.com/upload/ckfinder/files/benud.pdfIn PDF document text
    • http://platcometals.com/images/file/suvamiliwuf.pdfIn PDF document text
    • http://abc-tel.ru/data/File/vevawitotovevakuwiwedu.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/94795128560.pdfIn PDF document text
    • http://dolekkoyum.com/admin/UserFiles/file/volewanap.pdfIn PDF document text
    • http://trunghungplastic.com/luutru/files/80564288291.pdfIn PDF document text
    • http://taxplus.in/images/contentimages/files/47774200236.pdfIn PDF document text
    • http://0575zl.com/userfiles/file/77551777041.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/66220120615.pdfIn PDF document text
    • https://rosanaalvarracin.com/userfiles/file/tabefunalunadaxewox.pdfIn PDF document text
    • https://bokaichenyu.com/upload/files/27917404579.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/91192274776.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a15ecefad0---23347619776.pdfIn PDF document text
    • https://comptables-publics.fr/userfiles/file/xosifevezibokagupazenur.pdfIn PDF document text
    • http://fobosgrunt.ru/files/ckfinder/files/56242140368.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/lanubulumedobidaretuga.pdfIn PDF document text
    • http://aromaonly1.com/yamituki-n/uploads/files/40201164808.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021091404360973499.pdfIn PDF document text
    • https://cakenflowersonline.com/userfiles/file/28341460379.pdfIn PDF document text
    • https://culturasiapamplona.com/guiarte_userfiles/files/50648364172.pdfIn PDF document text
    • http://sarica.com.tr/ckfinder/userfiles/files/tujoxigigiluxofu.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51380690178.pdfIn PDF document text
    • https://nangluongvada.com/uploads/files/jafolotubidivinefunano.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=six+sigma+project+examples+pdfPDF 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_off0000bac8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAC8 11164 bytes
SHA-256: ffdb969c6ae6172c4d4952c287bd913d80c0251b3964241653dea11cb7e0fe61
font_01_sfnt_off0000d4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A8 17924 bytes
SHA-256: 8d22ab937883d2a063eda9026568706760aca45eb76521d966d5419370c4699a
font_02_sfnt_off00010340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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