Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e0c970bdfb788e9…

MALICIOUS

PDF

98.9 KB Created: 2021-03-29 18:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 00298f627aa654dd252d31f27f374d1e SHA-1: 6559fe5dae8a4e4b86292f425728b50a69aa641f SHA-256: 7e0c970bdfb788e9e165d3ac3b2fe9e74ce381f675d08dfdec232865ca075558
126 Risk Score

Malware Insights

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

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs pointing to a link farm hosted on disposable domains, suggesting a phishing or SEO poisoning campaign. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links on low-reputation hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jumiwimov.ru/123?utm_term=everglow+bon+bon+chocolat+song PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473632/normal_5fda50bf8743d.pdfIn PDF document text
    • http://padulima.22web.org/48213638770.pdfIn PDF document text
    • http://xibipumazanepir.iblogger.org/7649278858.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/dan_brown_angels_and_demons_series_order.pdfIn PDF document text
    • http://jukavoluv.iblogger.org/google_agenda_application_android.pdfIn PDF document text
    • http://dajexori.mypressonline.com/why_does_my_panasonic_phone_say_check_tel_line.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371004/normal_5fcb62786820f.pdfIn PDF document text
    • http://nunajurum.iblogger.org/35923453136.pdfIn PDF document text
    • http://baramijotafexo.mypressonline.com/mebop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469836/normal_5fd6a8b254a5c.pdfIn PDF document text
    • http://kegetisa.mygamesonline.org/attestation_sur_l_honneur_de_prise_en_charge.pdfIn PDF document text
    • http://vitavolu.22web.org/dowalujaziluxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414360/normal_6026d8dae74b5.pdfIn PDF document text
    • http://dipunag.getenjoyment.net/landslide_ukulele_chords.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462732/normal_601845d18bcb4.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/generos_periodisticos_resumen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://joposib.rf.gd/attu_movie_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pigolo/96019713342.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/what_does_f20_mean_on_my_kenmore_washer.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/oracle_hyperion_interactive_reporting_web_client.pdfIn PDF document text
    • http://wosemas.rf.gd/cultural_psychology_heine_3rd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/27869493363.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fcb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB3 24788 bytes
SHA-256: 299399f280fd1e75b52adcdf0ba8756bc30fae895738d2e4ef6719930136097f
font_01_sfnt_off000144c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144C1 5312 bytes
SHA-256: f7f8aa5021f66e9f3922b70f909e40dd0f6162d9b3f1c7992eb4ce9043ec3fd6
font_02_sfnt_off000156ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156EA 11472 bytes
SHA-256: 396a3df4b8e07ccd82bbf9ed8557e8d04c775b452a8187ceb849143010446fc7

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