Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d7f7b53e0080f2…

MALICIOUS

PDF

76.5 KB Created: 2021-05-13 22:52:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ffca92190bed875853c6c59af20acaef SHA-1: 54588369e23ebc99a49cd250543ab02bef8e2f97 SHA-256: 63d7f7b53e0080f22b9c4072ca99652cdeac3c403ef206a6e9c851692aa47853
206 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a clipboard-command (paste-and-run) lure and a password-protected-archive lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://nipisod.ru/strik?utm_term=dpc3825+reset+password PDF link annotation
    • http://guvinesusavilo.iblogger.org/human_services_a_student_centered_approach.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/cronica_mexicana_alvarado_tezozomoc.pdfIn PDF document text
    • http://lapegokexixij.medianewsonline.com/60316062534.pdfIn PDF document text
    • http://vakiduweg.mygamesonline.org/31085559686.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/pejebotekoxes.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/collapse_of_the_republic_fantasy_flight.pdfIn PDF document text
    • http://lumufurisazela.mywebcommunity.org/alphabet_grec_prononciation.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463279/normal_5ffc1698911e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5fcb21df35be6.pdfIn PDF document text
    • http://devigebogubiret.getenjoyment.net/corda_blockchain_tutorial.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/pevuwarobuvowa/gevivafakudeni.pdfIn PDF document text
    • http://zedofaxuboz.onlinewebshop.net/13549801375.pdfIn PDF document text
    • http://vuduluxepo.epizy.com/99297467690.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83f5b71f-d868-4f5b-ade0-1f3f7005ee15/palipoledono.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/24677042668.pdfIn PDF document text
    • http://sofibimibojas.myartsonline.com/how_to_adjust_resistance_on_elliptical.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78f0a2b2-ed4e-48fc-a24e-3331bebf691e/my_misspent_youth.pdfIn PDF document text
    • http://josuxak.atwebpages.com/17522451991.pdfIn PDF document text
    • http://wupokutixu.rf.gd/75259195532.pdfIn PDF document text
    • http://lipepojofutuxuf.epizy.com/30727804671.pdfIn PDF document text
    • http://rugupodat.epizy.com/free_antivirus_total_security_kaspersky.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/the_last_lecture_summary_chapter_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fa9f7fb-7d88-45e5-b876-77e92724200b/data_science_degree_uw_madison.pdfIn PDF document text
    • https://s3.amazonaws.com/vufupu/physical_and_chemical_properties_of_cadmium.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_off0000eca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECA1 5740 bytes
SHA-256: 89e6b8b62454ea805141ec3192b7c2f0d2163e4e1f69a302dea04f2c086b36b0
font_01_sfnt_off0001004e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 10668 bytes
SHA-256: a896483615a40f3dba6fd9706e188d1d6329509c5dc12bb9c74f730fab4e7779

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