Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db671c82ed7f764…

MALICIOUS

PDF

77.8 KB Created: 2021-04-08 22:41:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 808279be8016e8b009379793c84bdcfd SHA-1: 58421e3796966ff7a703d77caa128f32ce92d917 SHA-256: 6db671c82ed7f764a133d24283917bef855160d153f9e4c3af7f21b50cd4c0f7
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 0.9991

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://nipisod.ru/strik?utm_term=what+kind+of+apple+has+the+most+calories PDF link annotation
    • http://amandeepsadyora.com/sony_trinitron_27_inch_tv_weight1wgdw.pdfIn PDF document text
    • http://jusojixanona.getenjoyment.net/the_wonderful_wizard_of_oz_book_download.pdfIn PDF document text
    • http://teachost.com/83012478928dxtqp.pdfIn PDF document text
    • http://taduzexemi.22web.org/bucolique_bozza.pdfIn PDF document text
    • http://jifoxife.66ghz.com/dumbledore_s_army_sheet_music.pdfIn PDF document text
    • http://uuuuull.space/tirowapate4vm4.pdfIn PDF document text
    • http://fosipuzo.mypressonline.com/zofivugabimutudukafirejaz.pdfIn PDF document text
    • http://dapajurop.mygamesonline.org/python_language_reference_book.pdfIn PDF document text
    • http://tuimag.ru/porsche_cdr_24_wiring_diagramplc9q.pdfIn PDF document text
    • http://bobiruropiles.22web.org/admission_verb_form.pdfIn PDF document text
    • http://wegoradubi.sportsontheweb.net/battery_capacity_tester.pdfIn PDF document text
    • http://domavera.ru/melhores_cursos_de_ingles_online_pagosnkw68.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c5c3676-1626-4447-ac41-5527cd15e309/biblia_hebrea_y_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d4a0f5-a0ff-46e6-b2b5-13c1e1e9adb0/sitagoxav.pdfIn PDF document text
    • http://doroxokile.epizy.com/arithmetic_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/18469410893.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ef7d5db-f67d-4548-8d50-7122f92cbba6/taotao_50_scooter_carburetor.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/88845904478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83399e73-05d8-4947-ad60-3c889098226e/logitech_k520_keyboard_usb_receiver.pdfIn PDF document text
    • http://juwozevukiri.rf.gd/calendar_template_2019_canada.pdfIn PDF document text
    • http://tunojaw.rf.gd/49151576369.pdfIn PDF document text
    • https://s3.amazonaws.com/telasebisu/angle_pair_relationships_worksheet_answers_show_work.pdfIn PDF document text
    • http://dexisefafarure.rf.gd/sufimazo.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/54458191462.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDB 5472 bytes
SHA-256: c19cf50e629c79b804c20b277812ebc8490f2ade9c50ecbba5ede7e9ebf52296
font_01_sfnt_off0001025d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1025D 11532 bytes
SHA-256: a84f1c06cf294d49125a79a7c3d272013ceb449d8cd7f8ebdf441bb532bf26c4

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