Malicious PDF — malware analysis report

Static analysis result for SHA-256 d78912a1a6a79ab4…

MALICIOUS

PDF

75.3 KB Created: 2021-01-21 23:18:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 400ff1e62c6fc525d1845a24ded6e8d4 SHA-1: a497c19fe36f93a3a3211e0e47147817b1b6d2c8 SHA-256: d78912a1a6a79ab4baf34a8a6494ba5acf6f25620ec6b6dd3da39e0fd8494650
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/123?utm_term=ib+biology+topic+7+questions+and+answers PDF link annotation
    • https://site-1175584.mozfiles.com/files/1175584/android_auto_app_development.pdfIn PDF document text
    • https://site-1168030.mozfiles.com/files/1168030/business_plan_format_template.pdfIn PDF document text
    • https://site-1239447.mozfiles.com/files/1239447/como_por_o_instagram_preto_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450632/normal_5fe563477160e.pdfIn PDF document text
    • https://jowujutaxafekul.weebly.com/uploads/1/3/5/3/135348014/6153667.pdfIn PDF document text
    • https://site-1249465.mozfiles.com/files/1249465/halving_and_doubling_worksheets_year_4.pdfIn PDF document text
    • https://site-1171714.mozfiles.com/files/1171714/lisagaxawedazutuniw.pdfIn PDF document text
    • https://site-1171615.mozfiles.com/files/1171615/75076601873.pdfIn PDF document text
    • https://cdn.sqhk.co/gasowifozil/pjbujfC/rewanupibeja.pdfIn PDF document text
    • https://site-1206710.mozfiles.com/files/1206710/6344495173.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470967/normal_5fd665efe3043.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/3nhavja/8831042729.pdfIn PDF document text
    • https://durajonuz.weebly.com/uploads/1/3/1/3/131383269/8941009.pdfIn PDF document text
    • https://kiniwotonupit.weebly.com/uploads/1/3/0/7/130776343/fumatamujufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mokimonanogi.rf.gd/asylum_livro.pdfIn PDF document text
    • http://mutodilevo.epizy.com/41010067974.pdfIn PDF document text
    • http://nopatiget.epizy.com/fujitsu_cx400_m1_datasheet.pdfIn PDF document text
    • http://kuwoguki.epizy.com/bangla_full_movie_720p.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_off0000e940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE940 5716 bytes
SHA-256: d0a13d1f332bdde7ce2674d157d39377dd57befe6ddf258285751884d3cf6d28
font_01_sfnt_off0000fcd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD7 10356 bytes
SHA-256: 51829ea4af67571cbba81a9ac3d571bae5ca90ff7cd469e1905f562c15f5eb74