Malicious PDF — malware analysis report

Static analysis result for SHA-256 7baa671e98733267…

MALICIOUS

PDF

77.9 KB Created: 2021-03-01 17:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 0836fb36daa0ed9f70574e8483036f3c SHA-1: ed8f89c40f1ecb6a2101499d948d41227fbd39d1 SHA-256: 7baa671e987332673a943cceb989138e1f080c075c58aa6f90918c98dbdea448
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://vilenefex.ru/123?utm_term=nancy+drew+2002+movie+online PDF link annotation
    • http://nejevefivi.mypressonline.com/71121726853.pdfIn PDF document text
    • http://netewe8.xyz/20791786333mj0w7.pdfIn PDF document text
    • http://sipataj.sportsontheweb.net/62496847136.pdfIn PDF document text
    • http://fusobilel.iblogger.org/6423822680.pdfIn PDF document text
    • https://cdn.sqhk.co/fugovigul/tIhchgW/transparent_phone_screen_protectors.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487631/normal_5ff23ad548dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484375/normal_6030a5a6c58a4.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/toshiba_dvr620ku_record_vhs_to_dvd.pdfIn PDF document text
    • http://ruvujagefeko.mygamesonline.org/nimuzusiretawolotizozag.pdfIn PDF document text
    • http://voztrans.ru/55155165814yeszh.pdfIn PDF document text
    • http://lngcliente.com/fraction_comparison_worksheets_grade_49w93f.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/hfwi4pu/vodafone_yan_mda_ev_internet_hesap_ekleme.pdfIn PDF document text
    • http://itdomen.fun/be_with_you_2018_subtitle_englisho68xu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393019/normal_6039998931a9f.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/how_to_use_diesel_in_a_kerosene_heater.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489975/normal_603c3da66cfc9.pdfIn PDF document text
    • http://pogibofabut.getenjoyment.net/damolijazirirodokimokasaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://miganuvag.myartsonline.com/barupagena.pdfIn PDF document text
    • http://rovafitazilom.epizy.com/annamalai_songs_ringtone.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_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 5112 bytes
SHA-256: 1a352530c09c63168870efd12298f1a471c40c2491dc68f9ec8b51f650fe8152
font_01_sfnt_off0000f6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AB 10852 bytes
SHA-256: 9a1026c7c497077c303a0d9ff70744f99886b882e4faa3405746e0a27a783c45
font_02_sfnt_off00011bf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BF3 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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