Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa12e3e27c3509da…

MALICIOUS

PDF

66.2 KB Created: 2021-01-18 07:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 46f4aefc01c6580ce39915f5fedc5116 SHA-1: d766bb6436e502bbad0a3c5cc7ea0c36dd25f515 SHA-256: fa12e3e27c3509da4637da3a8339dd4aae6af601a0d7958b3c2bbaebbcd80e78
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. The ML_NYX_PDF_MALICIOUS and ClamAV detections strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external URLs points towards a phishing or malicious redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/123?utm_term=greenpan+valencia+pro PDF link annotation
    • https://fenikazegalo.weebly.com/uploads/1/3/1/3/131379965/419940.pdfIn PDF document text
    • https://nurifekuti.weebly.com/uploads/1/3/4/5/134516663/bapap_kesubev_ketudewosisupu.pdfIn PDF document text
    • https://nidegezepon.weebly.com/uploads/1/3/4/6/134650885/zikowokevonasud.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/ghXWhaa/can_t_open_camera_app_windows_10.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/fagixakegalilagosesif.pdfIn PDF document text
    • https://segamovav.weebly.com/uploads/1/3/4/8/134892249/4ac523805aec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f906d0118a48.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/hbghjje/hurricane_superhero_wind_tornado_vegas_mafia_online.pdfIn PDF document text
    • https://cdn.sqhk.co/tigufarejeti/RUXty31/billie_eilish_bad_guy_lyrics_youtube.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/1636841.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lokijuronig/smallpdf_production_files.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/nemon_network_cctv_monitoring_software.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/belanjawan_selangor_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/11323060887.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/bazaar_1982_full_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jukezeluf/biochemistry_exam_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/pradeep_neet_books_free_download.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c90f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90F 4840 bytes
SHA-256: 5ef2f62adfc8c173817c568b31ec9b46236e0fcc6d8734404d2a70180448c275
font_01_sfnt_off0000d9a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A2 10060 bytes
SHA-256: ec253f1028b9fdb1c7849ab5c7874dfcf0ca26db0e026f0131aa4f3521c628b7

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