Malicious PDF — malware analysis report

Static analysis result for SHA-256 089df94825e8d39e…

MALICIOUS

PDF

80.5 KB Created: 2021-03-17 16:25:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ef6c3d03997e21d5b184697509b10deb SHA-1: df3b860bd14218814f404a72fc2beac5a16d1770 SHA-256: 089df94825e8d39e7893c27026f5c2d9a934ad8a580b638a6723d66a914e607d
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 0.9994

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://xezojetit.ru/123?utm_term=bs+player++free+windows+7+greek PDF link annotation
    • https://cdn.sqhk.co/fegadosijete/0Z4jaia/renefifuju.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/fheagji/barwick_green_sheet_music.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/encapsulation_process.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/what_are_all_12_greek_gods.pdfIn PDF document text
    • https://cdn.sqhk.co/sopirisaset/flifWMU/table_top_racing_world_tour_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368228/normal_604dd4016538b.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/qasida_burda_shareef_complete_with_urdu_translation.pdfIn PDF document text
    • https://cdn.sqhk.co/gebemiwisero/dh9igjh/38726295879.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462066/normal_600c6dc18605c.pdfIn PDF document text
    • http://jizerigozigalav.getenjoyment.net/baritone_uke_chord_chart.pdfIn PDF document text
    • http://lelonul.iblogger.org/32437865084.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367004/normal_6019050e89d92.pdfIn PDF document text
    • https://cdn.sqhk.co/jimavidozeze/bcBUL7E/bull_run_shooting_center.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/88162450053.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de64df11-d2e4-4683-9ec4-d05d06412fe9/which_of_the_following_is_a_major_difference_between_the_house_and_senate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89889e30-61f2-4246-9bab-c833c029dea1/gepijiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gosete/machine_installation_report_example.pdfIn PDF document text
    • http://tisiwiruligeg.epizy.com/abrahaminte_santhathikal_malayalam_movie_720p.pdfIn PDF document text
    • http://midizigikeg.epizy.com/office_themes_powerpoint_2016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58f9795b-102b-4e80-9c6d-fb4dd72ee8e2/jaybird_x2_replacement_foam_tips.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/abbai_gari_pelli_naa_songs_com.pdfIn PDF document text
    • http://fapujeg.epizy.com/14019948906.pdfIn PDF document text
    • http://zizinamejukurep.rf.gd/petoma.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_off0000fcfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFA 5596 bytes
SHA-256: 610cc428dde68a1d7119c73b699ea512c9d601e7017276f97427790c97119ec3
font_01_sfnt_off00011043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11043 10532 bytes
SHA-256: 599916b6c16edaba2ec4c4b21cb2e4baa333d72c0aaf3e14c74189a2b2aeddde