Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f69d678071e2424…

MALICIOUS

PDF

75.6 KB Created: 2021-09-13 02:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6c0222e44976e8596fe6789f677605c7 SHA-1: ec5b7c18138cdf07176854ec40bb266387abdcd0 SHA-256: 9f69d678071e242457b62b2ac213a4e5fcfcfc2a923dc1e964c1b97dfe0fe47f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains numerous embedded URLs pointing to external PDF files hosted on disposable domains, indicating a link farm or distribution mechanism. The presence of external URIs and the link farm heuristic strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://allytemp.ru/uplcv?utm_term=8+ball+live+mod+apk+unlimited+money PDF link annotation
    • https://wonkingchina.com/d/files/21105221161.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/toxewebibubupumumid.pdfIn PDF document text
    • http://megalaserasia.com/upload///17188705845.pdfIn PDF document text
    • http://cdkuysuujk.handysociality.com/upload/files/xugeka.pdfIn PDF document text
    • https://autoroman-service.ro/imagini_ws/vigadorajujo.pdfIn PDF document text
    • http://textingrights.com/userfiles/files/sedip.pdfIn PDF document text
    • https://chokysitohang.com/Uploads/userfiles/files/76928428029.pdfIn PDF document text
    • http://erodiertechnik-wenzel.de/userfiles/file/wijufepubotojojil.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/jefivofidikizugupa.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/99477668850.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/dizolijodafijajefejux.pdfIn PDF document text
    • https://4wheelchile.cl/admin/uploads/file/wumigidufepidakivowepedev.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/bojaxolok.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/xujapebixapuraluwabejurad.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/69604568447.pdfIn PDF document text
    • http://millecolori.it/images/file/gunidipadiwu.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f87c466b58---rovilududanuviw.pdfIn PDF document text
    • https://shipnhanh247.vn/asset/files/velaranumotuvizovobif.pdfIn PDF document text
    • http://benedictinoselrosal.org/ckfinder/userfiles/files/64570186618.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/20210909/210909061723034227a6w7bc7sykdb.pdfIn PDF document text
    • http://saluteebenesseresas.it/userfiles/files/25109104818.pdfIn PDF document text
    • http://kerrya.com/ckfinder/userfiles/files/34571638708.pdfIn PDF document text
    • http://homestationrealty.com/userfiles/files/84232900016.pdfIn PDF document text
    • 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_off0000c1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DF 10908 bytes
SHA-256: 3b0becc8df83a92816e35826b8a07bceea50b953f98cc8cb0227a40d5c0aa986
font_01_sfnt_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F6 17864 bytes
SHA-256: 7bb58f426e5ed045a10564a297a8fbed2f473ca381b39f1ea54aed2443758172

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