Malicious PDF — malware analysis report

Static analysis result for SHA-256 04cc1b4f6aa06c89…

MALICIOUS

PDF

82.7 KB Created: 2021-03-25 19:49:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f714a09fc5ce85560273665c5d99d809 SHA-1: 965ce6fa46d2cee11268ff5899e8e1813892b6a0 SHA-256: 04cc1b4f6aa06c892edad984d0fbbc65069f62ae025bbab7c4a592e062c8de09
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 0.9996

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://midufefew.ru/123?utm_term=les+blague+de+toto+pdf PDF link annotation
    • http://bulubuzigajuzar.getenjoyment.net/jafafuseninemup.pdfIn PDF document text
    • http://unityfree.xyz/juicy_fruit_commercial_2000oklyv.pdfIn PDF document text
    • http://helpforteam.com/kodurupusogilamikodajapu0e98g.pdfIn PDF document text
    • http://mixed-rootwork.com/king_lear_movie_2008_watch_onlineiwxfu.pdfIn PDF document text
    • http://fukoramilani.22web.org/grammar_check_sentences_app.pdfIn PDF document text
    • http://tanemazijafawin.medianewsonline.com/toyota_camry_xse.pdfIn PDF document text
    • http://zokiwedilar.mypressonline.com/brassage_interchromosomique.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://vilatelisoto.onlinewebshop.net/war_and_peace_volume_3_summary.pdfIn PDF document text
    • http://mawafomixo.rf.gd/side_by_side_third_edition_book_1_audio.pdfIn PDF document text
    • http://vuwepowav.epizy.com/blank_tee_shirt_template_free.pdfIn PDF document text
    • http://bidilud.rf.gd/terraform_aws_elb_listener_certificate.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/boy_scout_uniform_patches_location.pdfIn PDF document text
    • http://dawejur.atwebpages.com/15062263473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03089216-46db-4f99-8b6b-9ee0d1780e3c/christmas_real_book_free.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/68490092594.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/christening_tarpaulin_template_psd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cfdfba9-dc0f-4d96-bc17-01cff54a8832/flight_engineer_salary_in_sri_lanka.pdfIn PDF document text
    • https://s3.amazonaws.com/ribowexulo/sipidojinopuwimuwet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d066aa86-3d5c-46f4-9b01-b68af18156ac/kovideronepupazi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 3052 bytes
SHA-256: f1fe9fbd6de20017deca449fed3141d2428a0b522bc12477e7ee913f00612dd6
font_01_sfnt_off0000f350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF350 4920 bytes
SHA-256: fe79d0458361e0d1f1e55edce88a2c0dab88812d5fa7133a160df9ca61cc14bf
font_02_sfnt_off0001041b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041B 14264 bytes
SHA-256: daef881c274a1b9c4dcf5af0dda6354041de644cd7508032688076b3f9e70c11
font_03_sfnt_off00012f63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F63 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378