Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb0a2627e4cdd4bf…

MALICIOUS

PDF

81.2 KB Created: 2021-09-13 07:23:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ad80e60061c560dcc5b1dbdacd5f4ce6 SHA-1: e1e02e9e6422e92e66943987bfe03095aa62d3b3 SHA-256: eb0a2627e4cdd4bf89309b16802c793bf6452f232e2ef656c270741f67a204ea
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic specifically flags this behavior. While no scripts were directly extracted, the presence of external URIs and the ML classifier's high confidence score indicate malicious intent, likely to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://allytemp.ru/uplcv?utm_term=remix+os+for+mobile PDF link annotation
    • http://identik.hu/editor_up/fipewazuxufegalub.pdfIn PDF document text
    • http://eternaseguros.net/files/files/28945945242.pdfIn PDF document text
    • http://pyhunlian.com/uploadfile/file/63850257233.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/pinizorokilizewowumadonaj.pdfIn PDF document text
    • https://edusfera.pl/upload/file/88190528548.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/saworitotijuda.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/81751579233.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/612feacf1553b.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/sodonabebinerewafus.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/lifanituji.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/wegapomewodowanilit.pdfIn PDF document text
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/mumakukezil.pdfIn PDF document text
    • http://klenderbio.com/upload/files/dagepixab.pdfIn PDF document text
    • https://vnnc.vn/img-hdmedia/files/18691321906.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/5801de2c08a1f0bd2e9bf438252f03e6/tigaka.pdfIn PDF document text
    • https://aayams.com/userfiles/file/jozurivinuko.pdfIn PDF document text
    • http://daivupaint.com/img-chamthi/files/15120275162.pdfIn PDF document text
    • http://nattuvaartha.com/assets/ckfinder/core/connector/php/uploads/files/lamodota.pdfIn PDF document text
    • http://myredm.ru/uploads/file/84741674605.pdfIn PDF document text
    • http://codienlanhtrangia.com/Images_upload/files/59510855624.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210903010802.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/30696986918.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_off0000dacd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E4 10296 bytes
SHA-256: e739b43f674d58d0f511d4522a3d94e34e3f4f3b01f24ded971d32e753fc5a81
font_02_sfnt_off00010a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A14 17632 bytes
SHA-256: 457068bcf6643101b2c2fba681916723f1337a0e139578c97fdb047c643fc8c9

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