Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc9c26374faa095…

MALICIOUS

PDF

83.8 KB Created: 2021-10-18 10:23:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0f11904fdfd65b1bfab081c529cba49a SHA-1: e3ff4dcd8e1dc741a0c9d1bed2a77be3dd0137d7 SHA-256: fcc9c26374faa095f3b5f6ff62b3bf18c252b8737bf3abc104abecc7788c3699
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains, indicating a phishing or link-farming scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and embedded links are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://oniceh.ru/uplcv?utm_term=in+your+eyes+song+by+george+benson PDF link annotation
    • http://cataga.de/beta/files/file/nuxovopirasurituxavajaj.pdfIn PDF document text
    • https://suncables.co/images/file/jumabifawabilelonoga.pdfIn PDF document text
    • https://aokman-drive.com/d/files/razovazuxelavukazijarovib.pdfIn PDF document text
    • https://reformedgeneration.com/userfiles/file/32386961621.pdfIn PDF document text
    • https://guijek.com/userfiles/file/84293741619.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/82328177338.pdfIn PDF document text
    • http://conditum.nl/userfiles/file/35860886062.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/kuzusijemebakifuliv.pdfIn PDF document text
    • https://ismart99.net/upload/files/23852781447.pdfIn PDF document text
    • http://savitaco.com/uploads/images/files/76921842956.pdfIn PDF document text
    • https://apexsafetyproducts.com/ckfinder/userfiles/files/xudijazepuxeju.pdfIn PDF document text
    • https://harmony-lazienka.pl/Upload/file/lepopazixenukeridewugiwas.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1615fe0e14c18f---zokigoxolixex.pdfIn PDF document text
    • http://cyuansheng.com/userfiles/file/xurozujipuwozaguzu.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/vatofuwaxive.pdfIn PDF document text
    • http://eska-lift.ru/userfiles/file/fakawezupejegiwufeso.pdfIn PDF document text
    • http://kolesa.sk/files/64389626417.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/11685548265.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/12661447027.pdfIn PDF document text
    • http://www.biosafety.biz/ckfinder/userfiles/files/31112580456.pdfIn PDF document text
    • https://sapporopools.com/contents/files/mojetaloxowutoxufuzovepa.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/91989799952.pdfIn PDF document text
    • http://xn--b1afklwjc5g.xn--p1ai/ckfinder/userfiles/files/worosukogamezudupi.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_off0000e067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE067 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF879 18992 bytes
SHA-256: 17e407ae2527190c89a190beda11d5460365e9de7b5342dc01dd7dcdffcb8535
font_02_sfnt_off00012a64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A64 10192 bytes
SHA-256: 30ed55609e29dbef753332fbf009816ece0bc1e0d7bc64319aff35ccaee8a8d5

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