Malicious PDF — malware analysis report

Static analysis result for SHA-256 51746e7e2c534074…

MALICIOUS

PDF

85.9 KB Created: 2021-03-22 02:05:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 498f3e51fe123c0df7384e352cee2364 SHA-1: 7b99296653b17ba3fa2f7bf1f9a6c8444236e19c SHA-256: 51746e7e2c534074beb907d0e818ba2a515ae22aa32de8f5072e88b8f23bbea1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one pointing to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a site that either hosts malware or attempts to phish credentials. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the phishing/malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://lozipotod.ru/award?keyword=menu+alimentation+%25C3%25A9quilibr%25C3%25A9e+pdf PDF link annotation
    • http://baltika-trans.com/cbse_english_guide_book_for_class_72ns1o.pdfIn PDF document text
    • https://nulivuxod.weebly.com/uploads/1/3/0/7/130776854/4934174.pdfIn PDF document text
    • http://giwewigipebi.medianewsonline.com/definobizafi.pdfIn PDF document text
    • http://it50disconto.info/maxitilavorctuwe.pdfIn PDF document text
    • https://dakikizubebara.weebly.com/uploads/1/3/4/8/134889455/4565957.pdfIn PDF document text
    • http://blancop.xyz/kebusisotuxevexam3sr.pdfIn PDF document text
    • https://jugifipunud.weebly.com/uploads/1/3/1/4/131437595/7624664.pdfIn PDF document text
    • http://juvasojiwal.66ghz.com/bazuf.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/bepokakijewilobot.pdfIn PDF document text
    • http://recepty-dd.info/sapamuxuwupiv6efdu.pdfIn PDF document text
    • http://wide-take.top/ethical_issues_in_business_a_philosophical_approach_8th_edition_ebook9yuyz.pdfIn PDF document text
    • http://cherrypimp.online/909739455296cpr.pdfIn PDF document text
    • http://tcerkovniekupola.space/32123326545fnfm3.pdfIn PDF document text
    • http://tesocoin.online/do_natsu_and_lucy_kiss_in_the_anime4habz.pdfIn PDF document text
    • http://jidonuse.iblogger.org/dewalt_3800_psi_pressure_washer_gun.pdfIn PDF document text
    • http://skidki-day.site/sunbeam_sleep_perfect_queen_fitted_electric_blanket_bl5151zh7n8.pdfIn PDF document text
    • http://wuxixezigitezir.mygamesonline.org/14687841501.pdfIn PDF document text
    • https://pudogujapoveg.weebly.com/uploads/1/3/6/0/136090910/waxomanupebisagagaw.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
    • https://s3.amazonaws.com/pukiza/matulob.pdfIn PDF document text
    • http://kigitom.epizy.com/13921888793.pdfIn PDF document text
    • http://bukarujinadir.epizy.com/vaastav_songs_mr_jatt.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/funny_and_dance_video.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/tubasupigazadifupeba.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FB 5304 bytes
SHA-256: 087f228b11decaefa93a87ec4ed7ee7ed7e9be8d578f2cecba02b03e12d90632
font_01_sfnt_off000112a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A3 12536 bytes
SHA-256: 0a53b8073e1206899e1e9358b87bb01cfd5aaf1dd860be029295b0ad008b9736
font_02_sfnt_off000139e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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