Malicious PDF — malware analysis report

Static analysis result for SHA-256 acb582de9f348d4a…

MALICIOUS

PDF

81.6 KB Created: 2021-03-06 02:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d1f62b6807115bdf0fa5d19938fd6392 SHA-1: 5ae499a71bf7e961f954a39e7df921b6ac9e6bb7 SHA-256: acb582de9f348d4a895478e8851ca6928782faa7c02907e9ec896a195e7e2f63
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a seed-phrase/secret-recovery lure. 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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://kuzutuzo.ru/strik?utm_term=how+does+bitcoin+work+youtube PDF link annotation
    • http://kyrgyztours.com/vojuxadorovianeb.pdfIn PDF document text
    • http://white-x.fun/download_pokemon_platinum_roms4o46t.pdfIn PDF document text
    • http://karnaval.host/best_witcher_mods_2020044ud.pdfIn PDF document text
    • http://xexisutufas.iblogger.org/punemufuz.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/siribimizemunanibini.pdfIn PDF document text
    • http://xenuven.22web.org/daily_mail_quick_crossword_answers.pdfIn PDF document text
    • http://levotavo.scienceontheweb.net/47447250761.pdfIn PDF document text
    • http://finipupote.mywebcommunity.org/stewart_calculus_early_transcendentals_2nd_edition_answers.pdfIn PDF document text
    • http://design-kvartira.info/11356725978puk67.pdfIn PDF document text
    • http://logvoz.ru/18841128778gzna.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/xotomisen/ffxiv_chocobo_racing_breeding_guide.pdfIn PDF document text
    • http://wekolaxoretewov.epizy.com/pesudaguv.pdfIn PDF document text
    • http://ziboporo.epizy.com/nimulufugujatixupamalivu.pdfIn PDF document text
    • http://besinaxot.epizy.com/how_to_make_drill_rap.pdfIn PDF document text
    • http://gipanitefoj.epizy.com/waludikovuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/mississippi_drivers_permit_book_2018.pdfIn PDF document text
    • http://bikikifuxax.epizy.com/ethiopian_airlines_crash_report_being_released.pdfIn PDF document text
    • https://8ed7b8cb-9bae-4def-ad9b-66b28cd11f91.filesusr.com/ugd/740d8c_7370c3d0d69e4a628726787e6ee0ac23.pdf?index=trueIn PDF document text
    • http://duloduxu.epizy.com/josinigulos.pdfIn PDF document text
    • https://s3.amazonaws.com/gezetega/usmc_corporals_course_answers.pdfIn PDF document text
    • https://7b4e975e-109f-4397-a679-93e438ff1453.filesusr.com/ugd/c33f71_5c9ed51746e34b9daa732bcda40f7dab.pdf?index=trueIn PDF document text
    • https://e0bfa911-60eb-4c53-bd8d-ceec25156dfb.filesusr.com/ugd/0a052f_c41e1c95a00c4cbdbd263357d1792215.pdf?index=trueIn PDF document text
    • https://d5fd0048-bb8d-45a1-ba21-28d1cb0b7162.filesusr.com/ugd/5e8de6_fe6c563dc38747e1853e13dcf1b81dfc.pdf?index=trueIn PDF document text
    • http://wiwosotu.myartsonline.com/wavanifotipogufineg.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/challenge_2_hd_video_song.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_off000103e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E7 5052 bytes
SHA-256: 056b32bf56c710a6ffc33f1f3449a88356a01343f600664a932865bcdfed0dd6
font_01_sfnt_off0001153c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153C 10560 bytes
SHA-256: 7d9a748c06f976182cbd662a6e8cfdb35498c215aa7e40f11d4dfbce7ed8b827