Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9708267b989b4b3…

MALICIOUS

PDF

79.1 KB Created: 2021-03-26 07:36:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 2583a4fc97454b0a2927643d66e54cbc SHA-1: 2e90a3356453a73678489ff31cd9a1c7d66210cc SHA-256: d9708267b989b4b332b2f717dc90cef0825d9bfcfda40c86cf39219107c73836
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one suspicious URL pointing to 'kuzutuzo.ru'. The presence of a large number of external links, including a link farm heuristic, suggests an attempt to direct users to malicious sites. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its content and structure designed for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=mecanica+vectorial+para+ingenieros+estatica+9+edicion+solucionario+cap+3 PDF link annotation
    • http://vufiwopader.medianewsonline.com/bonadepojebopuvige.pdfIn PDF document text
    • https://mezepobavufu.weebly.com/uploads/1/3/4/7/134717124/feruleluzerazi.pdfIn PDF document text
    • https://fabupegux.weebly.com/uploads/1/3/4/6/134689396/lawedogor_xogugidigaduru_sevatute.pdfIn PDF document text
    • https://xapugugividus.weebly.com/uploads/1/3/5/2/135298581/085754.pdfIn PDF document text
    • https://tujiniwiko.weebly.com/uploads/1/3/5/3/135350236/009b21374e0e394.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/genukopapovixo/barbie_dreams_official_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/739c2749-1953-4b93-84fc-d5f2e1c7f923/zoom_h4n_recorder_power_supply.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/peruvuzobixaxozem.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/the_other_side_of_heaven_2_dvd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff23b378-723d-4545-a948-8a572b280706/32754868342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/016f0298-1127-401c-ba12-9216105e0388/little_red_riding_hood_song_in_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/extrusion_acrylic_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6332c8a3-a152-42bb-aca8-45040081735c/how_often_should_you_do_ddp_yoga.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/81738409687.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71ea4ac5-32b7-439f-9772-7dc282bb6f26/28409567190.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/ashes_cricket_2009_wii_game.pdfIn PDF document text
    • http://wufagezigedo.onlinewebshop.net/1850463415.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1baf2f83-0e09-4e96-8028-12da560a07b0/garmin_nuvi_750_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/136eb732-550a-4581-bea7-926c4e7d5270/canon_powershot_sd780_is_price.pdfIn PDF document text
    • https://s3.amazonaws.com/seriposuj/excel_calendar_monthly_template.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/white_screen_on_acer_monitor.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_off0000f151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF151 5624 bytes
SHA-256: 1aaf8fe8d181f01cab317712d672c58e0a50f1c79a67d787d2ab2fc42547da55
font_01_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 12656 bytes
SHA-256: b25aed6c0e2280c0e6aaf73e40bbf62dc77e43ab80fca07904eef390fc54ed25

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