Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7aab8137736a61b…

MALICIOUS

PDF

72.9 KB Created: 2021-03-10 06:44:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5507bf9174e7ab9836991387e46a6f42 SHA-1: 95f66cdafbbae34974705794dfc59ecbe72548b6 SHA-256: e7aab8137736a61b4995299d315fa22256014a641eb2d05452dfbd358d6f8b40
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'adagio sheet music pdf', which is likely a lure to direct users to the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/award?keyword=adagio+sheet+music+pdf PDF link annotation
    • http://rerulekoba.66ghz.com/kagabiwegobusuxogono.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/40733052875.pdfIn PDF document text
    • http://doxisodezezaku.iblogger.org/secadora_maytag_atlantis_manual_en_espaol.pdfIn PDF document text
    • http://nuvuxek.iblogger.org/what_is_private_cloud.pdfIn PDF document text
    • http://pafalokixibam.iblogger.org/tajexufebo.pdfIn PDF document text
    • http://juvasojiwal.66ghz.com/fukedujepiretavenixosuw.pdfIn PDF document text
    • http://tifusavegapawuf.mygamesonline.org/16803368814.pdfIn PDF document text
    • http://zotikarida.medianewsonline.com/dowazevafumaderepegi.pdfIn PDF document text
    • http://puxuwowu.iblogger.org/les_accords_guitare_basse.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/zulabejitomija.pdfIn PDF document text
    • http://maxufadewodov.22web.org/mizekojupavexeli.pdfIn PDF document text
    • http://boxidodo.22web.org/how_to_know_if_i_want_to_saving_my_marriage_is_worth.pdfIn PDF document text
    • http://ruzoboxilotazex.22web.org/kogosalaxuxepunixibup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tizoraponu.rf.gd/monster_cards_5e.pdfIn PDF document text
    • http://mevafedepuneka.rf.gd/41242557348.pdfIn PDF document text
    • http://noratev.myartsonline.com/why_does_my_netflix_say_connection_error.pdfIn PDF document text
    • http://kemivitakes.rf.gd/gender_equality_report_european_commission.pdfIn PDF document text
    • http://kebipilukav.rf.gd/zozopamek.pdfIn PDF document text
    • http://jafajikizogid.epizy.com/aa_12_traditions_list.pdfIn PDF document text
    • http://xobiluwova.epizy.com/dorakubigepeliwaderikame.pdfIn PDF document text
    • http://pujusojup.epizy.com/90635683170.pdfIn PDF document text
    • http://subuvitoruxev.rf.gd/39084563597.pdfIn PDF document text
    • http://nivuzujanux.myartsonline.com/fiwasuke.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_off0000e04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 5428 bytes
SHA-256: b797857f8ad27f17c520d992e1f594f0e5b11236c23e599f33fe4741cb521185
font_01_sfnt_off0000f2ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AD 10504 bytes
SHA-256: b3078f736cb12fcd3cb355478a15f5bb3a9ee859969a02d2334be1dc41d91154

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