Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8a7d00715a8b6b4…

MALICIOUS

PDF

76.4 KB Created: 2021-03-14 14:02:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5d7ef1651c80756653fa8a8bed2997b0 SHA-1: 5f283a4268b3f12b71c9ea160a2239c4722c184d SHA-256: f8a7d00715a8b6b411904191e42239c59a142b377c19b992a1b4468fa514f4b6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm and by ML classifiers as malicious. The ClamAV detection 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=funciones+del+lenguaje+definicion PDF link annotation
    • http://noturufupama.iblogger.org/49989788709.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/wedding_march_mendelssohn_piano.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381531/normal_5feba164b580a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376357/normal_5fcefa42d4208.pdfIn PDF document text
    • http://vivodomox.22web.org/rodoziregutoxeloz.pdfIn PDF document text
    • http://gouliwer.online/wenumonabalobazanusiym68.pdfIn PDF document text
    • http://jotitojimo.mygamesonline.org/sujedobad.pdfIn PDF document text
    • http://mavpa.fun/karafun_player_25f3yy.pdfIn PDF document text
    • http://polikarmonolit.ru/food_guide_pyramid_blast_off_gamexn3w8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476437/normal_60443cd94ffdc.pdfIn PDF document text
    • http://zakosemej.mypressonline.com/zojiveju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/451f06e8-fce2-43bd-bd0c-96e0f0b7d45c/wonitiritur.pdfIn PDF document text
    • http://sosubixoza.rf.gd/87795981509.pdfIn PDF document text
    • http://gumofiwulova.epizy.com/kifokiw.pdfIn PDF document text
    • http://busilumun.rf.gd/todos_os_evangelhos_apcrifos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8141db2d-4559-458b-86d1-e1b59f76af05/74116106039.pdfIn PDF document text
    • http://lugumew.epizy.com/call_aundi_h_song_ringtone.pdfIn PDF document text
    • http://ritumogadoj.onlinewebshop.net/84293705354.pdfIn PDF document text
    • http://wewepov.rf.gd/appointment_booking_application_android.pdfIn PDF document text
    • http://sugunava.epizy.com/80353579966.pdfIn PDF document text
    • http://movasedumanepe.onlinewebshop.net/jarudatufamiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d34a6f57-624a-4225-8fdf-88c59f579411/persona_4_golden_walkthrough.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf22c03a-8ea1-432e-ae52-072520de90df/92933202527.pdfIn PDF document text
    • http://redoxewesusu.epizy.com/14003915088.pdfIn PDF document text
    • http://wuduzukatej.epizy.com/kannada_love_feeling_album_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_off0000e9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E5 5124 bytes
SHA-256: 309d15cb06e6c76c2653a670acf7ec6fc324c927fb459403a72b7cf1ea8db098
font_01_sfnt_off0000fb78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB78 12064 bytes
SHA-256: ea1d68b8152c7ffd4f9df930bb3ac36baaceb75f6e4b5287690bbc9b0cd7a5db

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