Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd84218457bcb94…

MALICIOUS

PDF

67.4 KB Created: 2021-06-10 12:25:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cdcdbd850afaa301a29731b16e2e211f SHA-1: 3e7e6246df366116a9db87a4b0edad3a7d9feb2c SHA-256: 4dd84218457bcb940516ed9d6d165a0627a54ae981a88e2b1eb5b9fc833feeda
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm designed to redirect users. The presence of a URL related to 'mr peabody and sherman full movie in english' suggests a lure to attract clicks. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing or trojan variant.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://synerhu.ru/pbw?utm_term=mr+peabody+and+sherman+full+movie+in+english PDF link annotation
    • https://rulotukipaka.weebly.com/uploads/1/3/0/7/130776525/mivakovimi.pdfIn PDF document text
    • https://xuratofojiwob.weebly.com/uploads/1/3/4/0/134096374/426797.pdfIn PDF document text
    • https://nuzazetoxulo.weebly.com/uploads/1/3/1/6/131636602/xixakikituba-foputuwaporeti-xelakutesunov.pdfIn PDF document text
    • https://vuxemirisem.weebly.com/uploads/1/3/1/4/131453034/7cd5066ed811ca.pdfIn PDF document text
    • https://sitekitenuzuvi.weebly.com/uploads/1/3/2/3/132303150/9965442.pdfIn PDF document text
    • https://leburivirabilaz.weebly.com/uploads/1/3/1/4/131453170/sasufibebaf-gowidepu-bosofe-ladutew.pdfIn PDF document text
    • https://xevivipemasap.weebly.com/uploads/1/3/4/4/134481894/3779c4e63e90.pdfIn PDF document text
    • https://womufotijomagew.weebly.com/uploads/1/3/4/3/134351515/lofuxokuz-jogux-juzofesef-zagunizovu.pdfIn PDF document text
    • https://jonajudadereses.weebly.com/uploads/1/3/0/7/130775123/9593501.pdfIn PDF document text
    • https://xepovilebifupu.weebly.com/uploads/1/3/6/0/136086158/9123235.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ronuzexem.pbworks.com/f/what_causes_crusty_sores_on_dogs.pdfIn PDF document text
    • http://barumena.pbworks.com/w/file/fetch/144462396/printable_2020_monthly_calendar_template_word.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5b2a04d-a66e-4a59-b7a6-4d770f1b6ac1/zabotazapolot.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/w/file/fetch/144424710/75349260745.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2cf1f13-3fef-4ee1-8737-cd77f8785989/90182876819.pdfIn PDF document text
    • http://tokemomonu.pbworks.com/w/file/fetch/144835908/sosenidox.pdfIn PDF document text
    • http://tojasakamu.pbworks.com/w/file/fetch/144869991/59355925836.pdfIn PDF document text
    • http://wiwedano.pbworks.com/f/ganozofafonenow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e1562ac-bc76-4ee0-ac97-3a733f4eea70/what_to_do_with_a_brown_bear.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab636a7e-759d-40a9-a482-8fe173adf0db/99036709313.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/fur_elise_piano_sheet_music_free_printable.pdfIn PDF document text
    • http://buxozodevoge.pbworks.com/w/file/fetch/145013073/reading_comprehension_grade_2_worksheet.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/f/63543909034.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_off0000ca4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4D 5760 bytes
SHA-256: fdcee897571c2b17b5db9c60d037b3da560d1a279df4b332d10d2e69fd07dfe6
font_01_sfnt_off0000ddd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD8 10036 bytes
SHA-256: 3483625051fbd2397b4ee57d5bd4fef4c53c9154f0ce75b14774da5343132db0