Malicious PDF — malware analysis report

Static analysis result for SHA-256 14858254614df8ae…

MALICIOUS

PDF

81.1 KB Created: 2021-04-12 17:17:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: faa90730158cc1f536645cf56c888eac SHA-1: e59baa494d69abf75ef7754871ad2786f4247cff SHA-256: 14858254614df8aea1b5372623378a48bb289eb0976fb372326db758df65a8cf
126 Risk Score

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://zajinet.ru/strik?utm_term=how+to+book+an+appointment+at+apple+store+australia PDF link annotation
    • https://cdn.sqhk.co/palezubifo/jhv5sgg/nutisumimujulerarajax.pdfIn PDF document text
    • http://tulusujubige.mygamesonline.org/zuwunenazopevofubodifov.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/eyKgejh/e_newsletter_template.pdfIn PDF document text
    • http://kersita.space/nipapimisilu89x.pdfIn PDF document text
    • http://ketousa.site/rodibofem4ntn.pdfIn PDF document text
    • http://pexulisinipev.sportsontheweb.net/39234029822.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/giRUnSP/basketball_hoop_toyworld.pdfIn PDF document text
    • http://sosed.market/taylormade_r15_driver_reviews42q83.pdfIn PDF document text
    • https://cdn.sqhk.co/rirakibugo/ifiijii/ig_word_family_videos.pdfIn PDF document text
    • http://hayatevesigar.online/xobemuzunutageluwowuzxn0f.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
    • https://s3.amazonaws.com/zuvovoxigumuz/nc_drivers_license_test_sample_questions.pdfIn PDF document text
    • http://xalatirasu.rf.gd/assassin_s_creed_1_guide.pdfIn PDF document text
    • http://ramenejepom.rf.gd/certificate_pem_crt_format.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/icloud_unlock_deluxe_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73af2d47-ec93-45ce-bf7a-3e85211351c4/11935131664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a4a488-8389-4aac-b8f8-443ac791f993/navy_correspondence_manual_5216.5.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/vefamejiw.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_off0000ef9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 5104 bytes
SHA-256: 9b4aa7077990c72e610b37cdf50a3431b2d84c1cb439dd854890b06494a90340
font_01_sfnt_off000100e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E2 10944 bytes
SHA-256: 9f5eae55370c6a6bcbf813312783310c787feab2a9d74debd7f1b29233bc864b
font_02_sfnt_off0001266e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361