Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f0c812bde6111d…

MALICIOUS

PDF

100.4 KB Created: 2021-03-29 07:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 312f12239766d1e533128582a4ff5ce1 SHA-1: 46cfe6e6df76a1cd39f65614ff962d23052c83fe SHA-256: d5f0c812bde6111d2fb3c466d3d8474a87245d80ef319bcfd1c760082b3859ce
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, indicating a likely attempt to redirect users to malicious sites for phishing or malware delivery. The document body is heavily obfuscated and contains metadata related to its creation, but no clear textual lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://nipisod.ru/strik?utm_term=pride+and+prejudice+watch+online+with+subtitles PDF link annotation
    • http://biwedujurar.mywebcommunity.org/jvc_vhs_camcorder_tapes.pdfIn PDF document text
    • https://kisogegexene.weebly.com/uploads/1/3/4/3/134374262/3132901.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • http://2220202.ru/primary_sedimentary_structures_geologyezpf9.pdfIn PDF document text
    • https://mewupigokudupez.weebly.com/uploads/1/3/0/7/130738506/5745325.pdfIn PDF document text
    • https://cdn.sqhk.co/doburazax/euhiiN9/fepesot.pdfIn PDF document text
    • https://cdn.sqhk.co/botonerepap/ghkpghh/wegunigosole.pdfIn PDF document text
    • http://fabujisaw.mygamesonline.org/intertherm_furnace_installation_manual.pdfIn PDF document text
    • https://tusidotug.weebly.com/uploads/1/3/4/4/134482214/4360990.pdfIn PDF document text
    • http://it50discount.pro/39452874813349c0.pdfIn PDF document text
    • http://latuha.com/ansible_dry_run_template6y80l.pdfIn PDF document text
    • http://pedrons.space/pelawadagewubexadogubucn4lh.pdfIn PDF document text
    • https://cdn.sqhk.co/ronofumito/jXJihk2/download_game_nba_live_mobile_basketball_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/dojerilu/2o1yggd/guess_the_tiktoker_by_emoji.pdfIn PDF document text
    • http://probnik1313.tech/birthday_animated_video_free93rqb.pdfIn PDF document text
    • http://kurametugugu.mygamesonline.org/third_shift_jobs_hiring_asap.pdfIn PDF document text
    • http://nuzarekuzugav.mypressonline.com/sonuxotumi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f110cc6a-49d6-427c-9ab6-a3a4d323b004.filesusr.com/ugd/9e53d4_590c69dd48884463a2153e484da18346.pdf?index=trueIn PDF document text
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_49e306977bfe4796ac7f2ff08782a78f.pdf?index=trueIn PDF document text
    • http://gufopexolax.myartsonline.com/gijakuforemisodezesutu.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/born_to_entertain_sheet_music_free.pdfIn PDF document text
    • https://1d812fcc-cfc3-4558-a870-56fc5b7f4c2e.filesusr.com/ugd/754d94_0150a53d196048a6ab2d10ce15e45432.pdf?index=trueIn PDF document text
    • http://kepagewav.atwebpages.com/dr_martin_luther_king_jr_i_have_a_dream_speech_lyrics.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/257869727.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_off00014ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD8 5468 bytes
SHA-256: 591df06646bd9e4fcc82e69633bc25898b078d38577792558dc369a9c96fb7e4
font_01_sfnt_off00015d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D73 11340 bytes
SHA-256: 7d1e998f70800dee7ea5b0ca5b7a4066c6ee2fa1eae17f20ee56ded971e3403e

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