Malicious PDF — malware analysis report

Static analysis result for SHA-256 6713ceb68fc8c2e7…

MALICIOUS

PDF

88.8 KB Created: 2021-09-11 13:08:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: e8388ae7e13f5fd8416ef5fd6b88e00b SHA-1: f2b4fde8457e319ab993c09b1481ac635f49e0f1 SHA-256: 6713ceb68fc8c2e702fafd18061cb04e4814e167d4c4524f534d3f6ccb9b04fb
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript and multiple external links. One high-severity heuristic indicates a PDF link to an algorithmically-generated URL, and another flags the PDF as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mi-stores.com/basketballtotaal/images/editor/file/92466463750.pdf In PDF document text
    • https://jjpremiers.com/files/bemugituras.pdfIn PDF document text
    • https://aildf.in/userfiles/file/90329431232.pdfIn PDF document text
    • http://solar-makernavi.com/ckfinder/userfiles/files/18970508314.pdfIn PDF document text
    • http://wannawwannie.pl/userfiles/file/rijewopajezenexonivonuji.pdfIn PDF document text
    • http://1carl.com/userfiles/file/ligudujobizuseboforu.pdfIn PDF document text
    • http://adriennemason.com/assets/files/67551912247.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210902192416.pdfIn PDF document text
    • http://elektrostroy.kz/ckfinder/userfiles/files/nomubikorem.pdfIn PDF document text
    • http://dentalcenterstudio.it/userfiles/files/dokabukusan.pdfIn PDF document text
    • https://www.corpeverest.com/ckfinder/userfiles/files/76773264662.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/90445768065.pdfIn PDF document text
    • http://szguilong.com/userfiles/files/85657383198.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/vuwunepibilalobegera.pdfIn PDF document text
    • http://goldendoodlesofthesierranevadas.com/userfiles/file/bimuveduvonikiragotirigu.pdfIn PDF document text
    • https://defi128.phpascal.com/userfiles/files/55173559729.pdfIn PDF document text
    • http://ovecollection.com/royal/admin/images/products/file/32683451461.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/41810708621.pdfIn PDF document text
    • http://lamelove-zakryti.cz/userfiles/file/26727632139.pdfIn PDF document text
    • https://dm288.com/slicice/file/gonuwopowuwilonijet.pdfIn PDF document text
    • http://viacaosaopedro.com/www/js/ckfinder/userfiles/files/zogaxapasuvavi.pdfIn PDF document text
    • http://alhambra.kopanramen.com/uploads/files/20237760554.pdfIn PDF document text
    • https://rowsontw.com/shopadmin/upload/files/75845819907.pdfIn PDF document text
    • http://fotocaroli.it/userfiles/files/14748749458.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/15017530046.pdfIn PDF document text
    • https://best-label.com/upload/files/85853698667.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=the+secret+book+in+bengali+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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d585.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD585 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 11096 bytes
SHA-256: 4db317b429c4eaee39e6fea876150777741ea47984c23e99acd9a6b571f2b8d7
font_02_sfnt_off000106ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FF 20828 bytes
SHA-256: 8a19742cac3ed2a1b6b4c033828c190183d4e873308afc01b7d25bb1c0ac07a8
font_03_sfnt_off00013e28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E28 16512 bytes
SHA-256: 58041ff1665b73b7f585f369b26a6fa5a54736583f154ec909f2e04cba1c2bd3

Open this report in the interactive analyzer, or submit your own file for analysis.