Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f1c83c374b54da2…

MALICIOUS

PDF

77.4 KB Created: 2021-04-05 03:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: e83b3b54bfd2b76b0e59226cc13068ba SHA-1: 8378d3d3155b1f5a1988f553903c90a2a787b212 SHA-256: 6f1c83c374b54da21ab6fc7100cf2ff2a2a1e6cb7727d76e1297fdc6acac99c3
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a link farm, with one suspicious URL pointing to 'ponafet.ru'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ponafet.ru/strik?utm_term=how+to+descale+my+2.0+keurig PDF link annotation
    • https://pesuwoleze.weebly.com/uploads/1/3/5/2/135295903/pemifazesexo-tigepinip-wuzowulovetox.pdfIn PDF document text
    • https://cdn.sqhk.co/keperivosa/IhcirQ5/fact_finding_mission_report.pdfIn PDF document text
    • https://refefutetolesom.weebly.com/uploads/1/3/4/8/134868450/368288.pdfIn PDF document text
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/guvejebojiravubub.pdfIn PDF document text
    • https://piborubaladedos.weebly.com/uploads/1/3/4/7/134764427/nuwaka-gazubafubiku.pdfIn PDF document text
    • https://dubasebajulux.weebly.com/uploads/1/3/1/3/131382081/2762346.pdfIn PDF document text
    • https://cdn.sqhk.co/gabisolovima/hWiahiT/music_player_with_lyrics_app_download.pdfIn PDF document text
    • http://novoruxove.iblogger.org/92198181904.pdfIn PDF document text
    • https://foxenaduro.weebly.com/uploads/1/3/1/1/131164157/renexazig.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/fadadedezeker/what_is_the_average_salary_for_a_chemistry_teacher.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/how_to_swim_with_the_sharks_without_being_eaten_alive.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/autopsy_reports_raleigh_nc.pdfIn PDF document text
    • http://mixonanax.epizy.com/what_is_the_metaphysical_world.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/excelsior_springs_golf_course_calendar.pdfIn PDF document text
    • http://wefasinufatotag.epizy.com/78662453855.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/romiwekezexozuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/43388297307.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/62287462535.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/25008064953.pdfIn PDF document text
    • http://loxugosatutibiv.epizy.com/how_to_glaze_heb_spiral_sliced_ham.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/joint_service_commendation_medal_citation_template.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_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 5784 bytes
SHA-256: a4721f883431cdb93a5e9f7858c622f30ae9d743e4d1a3ddb9fdf0b7f8033729
font_01_sfnt_off0000ffe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 11404 bytes
SHA-256: 60d53f28c0391c002cf854555d51702a51271d2689322b25931caefad0392e9a

Open this report in the interactive analyzer, or submit your own file for analysis.