Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c039106ce71f6e5…

MALICIOUS

PDF

72.0 KB Created: 2021-02-23 08:32:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c20b2adedf71ed7ce5cbc328342162b5 SHA-1: e9977053bc539219f7b242b9dde0085e891bcb6b SHA-256: 6c039106ce71f6e567aa3386c6fbf8b1d966f76f29028d850d3807c6d9cab076
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains embedded URLs that redirect to potentially malicious domains, disguised as search results for salary information. The presence of external URIs and link farm heuristics suggests an attempt to drive traffic to these sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/aws?utm_term=how+much+is+the+salary+of+flight+attendant+in+canada PDF link annotation
    • http://tipopajokoti.iblogger.org/behringer_u-_phoria_umc202hd_driver_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494451/normal_5fe9e42964e43.pdfIn PDF document text
    • http://jumbochecker.com/pubg_mobile_metro_royale_update_dateq175q.pdfIn PDF document text
    • https://cdn.sqhk.co/kigaratak/RddoRjh/1634447834.pdfIn PDF document text
    • http://mabirimelu.iblogger.org/37378343256.pdfIn PDF document text
    • https://cdn.sqhk.co/desogepupema/hbgeLid/bloodborne_pathogen_medical_definition.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/Fxshdlk/dujigudonapisulolo.pdfIn PDF document text
    • http://helps-lnstagramcopyrights-about.com/dirujavagufiradin5az4.pdfIn PDF document text
    • http://tesubozapo.22web.org/33504074720.pdfIn PDF document text
    • http://fb-ig-violation.com/emoji_puzzle_game_download_apk89pm2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4506063/normal_6033562f96a51.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvisisitinu/jihSERJ/41845196285.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/dutimajizowa/inno_e_marcia_pontificale_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/64784363809.pdfIn PDF document text
    • http://miwusox.rf.gd/brothers_2009_film_full_movie.pdfIn PDF document text
    • http://novoboninixeme.epizy.com/someone_you_loved_piano_sheet_music_accompaniment.pdfIn PDF document text
    • http://migukim.rf.gd/gunimodujojagiwagirabe.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_off0000dd11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD11 5592 bytes
SHA-256: 5615939909dc72544693dbcd6d80e2b8d03bb9ad4108362767fe233aba480ea7
font_01_sfnt_off0000effd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFD 10160 bytes
SHA-256: 775ba8942726194959b21455de8d8b7fb3c9a2fc66ea642e1f147aefd54f50f9

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