Malicious PDF — malware analysis report

Static analysis result for SHA-256 aee082978a054715…

MALICIOUS

PDF

84.6 KB Created: 2021-09-13 01:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6b723ec5f8b70c169d65356cd6607117 SHA-1: 4b6d680d54282e6ecfdeefda6bcec3df992f3f55 SHA-256: aee082978a0547154dcc0a238eb6731ddfd9969b68a6bd35d018a2e582e9f1d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The document contains numerous embedded URLs pointing to a link farm, suggesting an attempt to redirect users to malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a strategy to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://honeycontacts.com/uploades/userfiles/file/93642630602.pdf In PDF document text
    • https://yomadesign.com/userfiles/Proj_Name/files/45938198985.pdfIn PDF document text
    • https://mercerapparelss.com/userfiles/files/bexor.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161332a27d5ffe---17516675928.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/82669378313.pdfIn PDF document text
    • http://aal.tw/uploads/htmlupload/files/55203845103.pdfIn PDF document text
    • https://presstone.hu/userfiles/file/zenakutujose.pdfIn PDF document text
    • https://strategieb2b.ca/userfiles/file/juzilironumumeperi.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/46895866407.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/80285984190.pdfIn PDF document text
    • http://www.shjkyq.com/up_files/FCK/file/55640058906.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/63398004277.pdfIn PDF document text
    • http://dreamscar.eu/userfiles/file/memokuvopuwu.pdfIn PDF document text
    • http://mskabel.cz/UserFiles/File/kafagurelujuxav.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d252754d55---13226489754.pdfIn PDF document text
    • https://sofupingame.net/calisma2/files/uploads/tofatavorakoj.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/zejegesugosibora.pdfIn PDF document text
    • http://mfahk.com/upload/files/nidapugirumaberoturuwise.pdfIn PDF document text
    • http://autothudo.vn/upload/fck/file/sezefudi.pdfIn PDF document text
    • http://versobrokers.eu/userfiles/files/68416237296.pdfIn PDF document text
    • https://iskoruma.com/upload/ckfinder/files/radoxutufirurozozilapibil.pdfIn PDF document text
    • https://geniodelweb.com/file/80906937540.pdfIn PDF document text
    • http://htwy.com/upload/file/tavutu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lock+my+lost+android+phonePDF 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_off0000e4b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B8 18300 bytes
SHA-256: 7314872491ade02fc0488d90e7dbaa2ec8e7d5030a99f3a484c63fd32ece15b0
font_01_sfnt_off000113ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012be5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE5 10940 bytes
SHA-256: 4142817120bf2a902fb8f6158222f8890b8c9840c458555816a173bd6d53e78d

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