Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ebe866c5c61ee5d…

MALICIOUS

PDF

89.2 KB Created: 2021-03-17 19:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05ab08d79b073e1e8fc3032557375225 SHA-1: 7f7a51ed9943563209458012ddd887f01b07f99a SHA-256: 2ebe866c5c61ee5d43cb76390c0db5f5ca00d63cadc7834518135c059b1b5c87
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO poisoning or to direct users to phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=vbd+fantasy+football+2020
    • https://vonekinorosasox.weebly.com/uploads/1/3/4/7/134732286/b14171.pdf
    • https://lukigozijejis.weebly.com/uploads/1/3/5/3/135398738/kogimarav_zifemeketi.pdf
    • https://dazuzidasepod.weebly.com/uploads/1/3/2/6/132681566/a08b1bd7beff7f9.pdf
    • https://butabefuje.weebly.com/uploads/1/3/1/4/131437434/5f7ec0.pdf
    • https://bosudire.weebly.com/uploads/1/3/4/4/134456289/lomekumow.pdf
    • https://litazotivov.weebly.com/uploads/1/3/0/7/130740097/bubimizifeluluba.pdf
    • https://sutoxozugunewu.weebly.com/uploads/1/3/4/7/134768558/1c8de677.pdf
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/lekanazoruxo.pdf
    • https://zumaraje.weebly.com/uploads/1/3/0/7/130776401/gokepafubev_relaxoge_wesitoz_bajubumadawu.pdf
    • https://sukizasatesez.weebly.com/uploads/1/3/4/6/134686833/xosilasetekux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gonima/acls_advanced_cardiac_life_support.pdf
    • https://s3.amazonaws.com/dumupa/lions_injury_report_stafford.pdf
    • https://uploads.strikinglycdn.com/files/54bb8b48-26a9-47ed-b60c-a5897bbf569f/35185738506.pdf
    • https://uploads.strikinglycdn.com/files/5f182238-2d0c-4b40-8624-db2f35d71429/40408494909.pdf
    • https://uploads.strikinglycdn.com/files/37b4be9d-ca0c-49ab-8096-01210fa31a88/sivapuram_tamil_movie_mp3_songs_free_download.pdf
    • https://uploads.strikinglycdn.com/files/5392b28c-6885-4e37-b3d6-b749aeea242d/nisovud.pdf
    • https://s3.amazonaws.com/besafefaf/sodezopebozoz.pdf
    • https://s3.amazonaws.com/fidefofudi/60870228938.pdf
    • https://s3.amazonaws.com/fifuto/pejumemawovamixi.pdf
    • https://uploads.strikinglycdn.com/files/d1db4cd5-4e2c-4564-8e1e-79703aceb08e/ryobi_14_inch_40-volt_brushless_chainsaw_review.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f91.bin
0a0a315c837be670e4b0ca9c70338e9e637b0b9f5a324b7188e70719c0f8c7fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11F91 5284 bytes
font_01_sfnt_off000131a9.bin
bc05d0646042b0ff75fb6000e058bb8f38990b8a0abad83221b37335fc02cd2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131A9 11260 bytes

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