Malicious PDF — malware analysis report

Static analysis result for SHA-256 0265f7308ee0e40d…

MALICIOUS

PDF

80.4 KB Created: 2021-02-22 20:08:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: bd0661796473f779cf5b027c94e0435e SHA-1: 638e035784edff768327f307d2618e0125364b00 SHA-256: 0265f7308ee0e40dfa2e01f56f8770ddb5efe417175d1000ab0470a9cec3d1cf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to a site that hosts further malware or phishing content. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=employee+performance+self+appraisal+answers+examples+pdf PDF link annotation
    • https://cdn.sqhk.co/lakabarobuk/4jdpgfx/rakipumejitob.pdfIn PDF document text
    • https://cdn.sqhk.co/rabawula/fn5ifgh/49737876622.pdfIn PDF document text
    • https://cdn.sqhk.co/kojogitu/hiLgdij/my_talking_tiger_game_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/zirimikuj/wijUYii/49548528809.pdfIn PDF document text
    • https://cdn.sqhk.co/fenozidu/gjbijhg/electric_circuits_10th_edition_global_edition_solution.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427795/normal_5fe1d3b0dd998.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/hizgggi/v_model_testing_diagram.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxinugad/jhhh7hd/wiwusagirosevimuruveji.pdfIn PDF document text
    • https://cdn.sqhk.co/lefuwaregew/juGhd0a/stickers_for_cars_custom_made.pdfIn PDF document text
    • https://cdn.sqhk.co/kadeposamo/jhfcid0/talepij.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419205/normal_5fed677224dd2.pdfIn PDF document text
    • http://manekobe.22web.org/sokavup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453743/normal_602269329f693.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/jaJCvqY/boy_to_girl_voice_changer_app_during_call.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_602a505d6b17b.pdfIn PDF document text
    • https://cdn.sqhk.co/kulobibab/fQhjijb/62890122707.pdfIn PDF document text
    • http://jibesikore.iblogger.org/texas_dental_jurisprudence_exam_answers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dalizavok.rf.gd/42060394956.pdfIn PDF document text
    • http://nabepazefesuju.epizy.com/rrb_alp_result_2018.pdfIn PDF document text
    • http://molodetagako.epizy.com/how_many_carbs_in_arbys_bacon_beef_and_cheddar.pdfIn PDF document text
    • http://lememisuxelivem.rf.gd/50556487153.pdfIn PDF document text
    • http://popeladidet.epizy.com/42374671517.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_off0000fda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA1 5520 bytes
SHA-256: ba996f0b5769a31f69d11f9258da715a889e484af450abadfedc3a1e1464d7af
font_01_sfnt_off00011068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11068 10224 bytes
SHA-256: 8015a7967d549d32d62986f2601103539642ba66bef0cb616ddce073daa24e0e

Open this report in the interactive analyzer, or submit your own file for analysis.