Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dd23ee14b3a220c…

MALICIOUS

PDF

85.3 KB Created: 2021-09-09 20:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 041bc5bdec15123006ae815fcb3b6597 SHA-1: 93311534852a920a562e754def1f76e151cde354 SHA-256: 6dd23ee14b3a220c024a6ca7c44735651365f08e7d7c3cfd8419d5f81579d0d0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URIs pointing to external websites, many of which are suspicious or unknown, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates the document's purpose is to host a large number of links on disposable domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://alshaabcoop.com/userfiles/file/14625851806.pdf In PDF document text
    • http://sung1.com/upload/files/77043140275.pdfIn PDF document text
    • http://agrostroi-proekt.ru/ckfinder/userfiles/files/23426134273.pdfIn PDF document text
    • http://gradn.ru/uploades/fckeditorfile/nifojojularujulosikigase.pdfIn PDF document text
    • http://www.horakgolf.cz/ckfinder/userfiles/files/jivujobemile.pdfIn PDF document text
    • https://al-wesam.com/userfiles/files/76370746768.pdfIn PDF document text
    • https://baongochoa.com/upload/file/13424205325.pdfIn PDF document text
    • http://otestmanager.com/club/data/userfiles/file/20210902020321.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/zasasazejutos.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/jirilexupak.pdfIn PDF document text
    • http://ilsogno-bomboniere.com/userfiles/files/56901676431.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210909144533.pdfIn PDF document text
    • https://mimpishio.com/contents/files/22141319633.pdfIn PDF document text
    • http://newdimension.su/userfiles/file/gorale.pdfIn PDF document text
    • https://wfca-czech.cz/temp/userfiles/files/15353356223.pdfIn PDF document text
    • http://shangyi-pump.com/uploads/file/060801451455.pdfIn PDF document text
    • http://everintelconsulting.com/upload/file/202109092232469802.pdfIn PDF document text
    • https://egf.tw/test2/images/file/61363922309.pdfIn PDF document text
    • http://onlytech-tunisie.com/userfiles/file/lisoguwejobosomojinenov.pdfIn PDF document text
    • http://kammed.com/userfiles/file/50274255285.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16135805de3f0f---jivamizejavo.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/69450643121.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/72899726645.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139ce0810708---12374702528.pdfIn PDF document text
    • https://arabadvertise.com/userfiles/files/34538996428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+increase+sound+volume+in+androidPDF 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_off0000e862.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE862 17676 bytes
SHA-256: 370efd091673e9318f6ad92801002b77f6969e8813d87f1f47ba8a433de100f5
font_01_sfnt_off00011685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11685 10776 bytes
SHA-256: e847073c6c2d71fe4756be8517081c2be95774d6772072b3f75f075b00c15f50
font_02_sfnt_off00012f5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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