Malicious PDF — malware analysis report

Static analysis result for SHA-256 7206f9514564e0e5…

MALICIOUS

PDF

83.7 KB Created: 2021-06-04 01:30:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8e96662a29f85dc532403f7bccb9c46c SHA-1: f2ee574425eb7af3b5d3b85e189f98d157ee60aa SHA-256: 7206f9514564e0e570c6cee0bdf612553e8fb1f125dec32c2cbefa08083f5d9f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1534 Steal or Forge Credentials

The sample is identified as a phishing lure impersonating Facebook, directing users to a malicious redirector. The PDF contains multiple external URIs, including one that appears to be a link farm, and is flagged by ML classifiers and ClamAV as malicious. The primary goal is to steal user credentials through a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://sajixigepanosu.weebly.com/uploads/1/3/1/0/131070231/91e159c51d6a.pdf.
  • 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://catamma.ru/pbw?utm_term=free+ca+dmv+permit+practice+test+in+spanish PDF link annotation
    • https://sajixigepanosu.weebly.com/uploads/1/3/1/0/131070231/91e159c51d6a.pdfIn PDF document text
    • https://viwoxinuzozaxa.weebly.com/uploads/1/3/1/6/131636825/2c239723d444e.pdfIn PDF document text
    • https://sotemupavunu.weebly.com/uploads/1/3/1/4/131413148/8988099.pdfIn PDF document text
    • https://bunavomotuta.weebly.com/uploads/1/3/4/6/134606544/biminodojifew_bepon_jezulax.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/4c24f0f8b.pdfIn PDF document text
    • https://rowimunikak.weebly.com/uploads/1/3/5/3/135346477/5602490.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
    • http://larabefejaji.pbworks.com/f/vaporufonopitododi.pdfIn PDF document text
    • http://gabekujijud.pbworks.com/w/file/fetch/144539931/subegexapajekoge.pdfIn PDF document text
    • http://lekuzax.pbworks.com/f/23187220359.pdfIn PDF document text
    • http://vatojorisa.pbworks.com/f/dinenufo.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/144578112/peconic_bay_transfer_tax_form_instructions.pdfIn PDF document text
    • http://mujefapufefi.pbworks.com/f/lapet.pdfIn PDF document text
    • http://funinupun.pbworks.com/w/file/fetch/144425064/descargar_starcraft_portable_para_android.pdfIn PDF document text
    • http://sisagexal.pbworks.com/w/file/fetch/144519984/review_phim_when_marnie_was_there.pdfIn PDF document text
    • http://noxixap.pbworks.com/f/sabexuxibet.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144542340/summertime_saga_old_version_mod_apk_download.pdfIn PDF document text
    • http://xuvabufoj.pbworks.com/w/file/fetch/144555837/76214240655.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/texto_diario_delos_testigos_de_jehov_de_hoy.pdfIn PDF document text
    • http://rimogeto.pbworks.com/w/file/fetch/144580116/biriginarix.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_off0000fc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC98 4976 bytes
SHA-256: 7c7d50cd555cbae158062d324ebf4cb4772aba66bd9a043e60ff69a08950ec11
font_01_sfnt_off00010d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D48 11060 bytes
SHA-256: 53d74f7912ebcff1dccd56d42c56c1c431eb1b6cae3e170f2fe3f8e8d134f0ee
font_02_sfnt_off00013322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13322 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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