Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7dc1baecb5cd472…

MALICIOUS

PDF

81.3 KB Created: 2021-02-14 02:59:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ee529756a38c36d51e435500b5199577 SHA-1: 1c36acfc9bfb60c3f1f8a40ef821e4de92abc1e5 SHA-256: f7dc1baecb5cd4723dc1e301b84fabd5957ee44493b6759cf2fcab0598d55ad2
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=curriculum%20guide%20grade%202%20deped In PDF document text
    • https://jurivulanikep.weebly.com/uploads/1/3/4/5/134525456/puloweje-jupif-dipuwi-soxore.pdfIn PDF document text
    • https://puxodupewuna.weebly.com/uploads/1/3/0/7/130739405/vifevivupalev_zemiwu_lalube_tozosel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491436/normal_601431800060e.pdfIn PDF document text
    • http://pexiwaz.iblogger.org/bitlord_2._4._1_free.pdfIn PDF document text
    • http://ver-alex.website/nusedijcd651.pdfIn PDF document text
    • http://igrarazuma.info/payday_2_keepers_modookvh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419623/normal_5fdbaaf896be4.pdfIn PDF document text
    • https://sotezogurew.weebly.com/uploads/1/3/2/7/132740991/rudegegerawomibiw.pdfIn PDF document text
    • http://goloszauniver.fun/o_come_all_ye_faithful_sheet_music_eioyey.pdfIn PDF document text
    • http://azules.ru/ritalipgbnj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390057/normal_6017775b49698.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/hhejjjc/space_invaders_movie_cast.pdfIn PDF document text
    • https://relelije.weebly.com/uploads/1/3/1/4/131438324/3046649.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowomazo.epizy.com/wolfenstein_the_old_blood_trophy_guide.pdfIn PDF document text
    • http://gopudagob.epizy.com/windows_10_from_windows_7_free.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_off00010151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10151 5252 bytes
SHA-256: 620658ad89bd3d6056893189e89c88a30be8ea70ceeb7eec8cd97e942ddf8ad3
font_01_sfnt_off00011313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11313 11088 bytes
SHA-256: 3caa70d611f32bbab63c0b855495309417a812d3366c6b1ba2c34f438a4e85a7