Malicious PDF — malware analysis report

Static analysis result for SHA-256 7baf4ccefc9c72ba…

MALICIOUS

PDF

90.2 KB Created: 2021-02-19 22:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9546e1f1fbba85ebdec3846f512604d9 SHA-1: b84be6430c25173c80544bc1db687567fc2ed96d SHA-256: 7baf4ccefc9c72ba6ad2fcd363a36bcb84cb84d8e0864fa98a7a99555615e88f
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a phishing or redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of numerous URLs points to an attempt to lead the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://maypoin.ru/strik?utm_term=que+son+las+finanzas+personales+pdf PDF link annotation
    • https://cdn.sqhk.co/rosivapixove/gpfvSjf/apakah_game_summoners_war_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/tajiwikiter/jfiadvY/youtube_studio_combine_videos.pdfIn PDF document text
    • https://cdn.sqhk.co/padixemugex/3gc9b9L/kpop_music_shows_voting.pdfIn PDF document text
    • http://websporizle3.com/99121644664t6vop.pdfIn PDF document text
    • https://cdn.sqhk.co/navozaxezini/gg4ache/electric_guitar_sounds_in_words.pdfIn PDF document text
    • http://golivexi.22web.org/wodawumubesagewamaxak.pdfIn PDF document text
    • http://canonsburglake.com/free_printable_2020_calendar_templates_with_holidaysloko3.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/rF5hhhf/hockey_goalie_skates_vs_regular_skates.pdfIn PDF document text
    • https://xetomulezaze.weebly.com/uploads/1/3/0/9/130969551/9275115.pdfIn PDF document text
    • http://pizidojokinesa.66ghz.com/google_earth_maps_street_view_free_download.pdfIn PDF document text
    • http://fobifisoba.22web.org/dojukigoxipafe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fiwofitobuz.rf.gd/42345338016.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/bonafide_certificate_format_for_engineering_students.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/one_step_equations_with_fractions.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_off0001210c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210C 5148 bytes
SHA-256: dbbda47f39b0d756d8e7366d6619dd699c2d1594cddf1440e4e729428db84bfc
font_01_sfnt_off000132a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A6 12132 bytes
SHA-256: d3433589279dd331ab08f051c1f3e63c8c5dca71b196192e6f13f84e53c86f64

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