Malicious PDF — malware analysis report

Static analysis result for SHA-256 c79ae53110906a18…

MALICIOUS

PDF

66.8 KB Created: 2021-03-26 09:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 24a3d7617f2f3e369d7433d1268ce514 SHA-1: bd24ce6e312053cac1ca04d31a91dbe11032bd04 SHA-256: c79ae53110906a18b7571a7bf397c6fcce7a129385c95fd588718f4e3ab224c7
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' specifically points to a free-download phishing lure, directing users to the URL https://botokaw.ru/123?utm_term=adventures+of+omanakuttan+malayalam+movie+free. While no scripts were explicitly extracted, the PDF structure and the presence of external links suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/123?utm_term=adventures+of+omanakuttan+malayalam+movie+free PDF link annotation
    • http://odebayitrafikhizmeti.com/add_footer_to_wix_pagekshnf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421613/normal_60380d103a701.pdfIn PDF document text
    • http://instahelpforbusiness.com/cocked_hat_crossword_answer42xst.pdfIn PDF document text
    • http://kedamijofulufep.mygamesonline.org/marketing_public_relations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_6029c505c12dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475863/normal_5fcc54be58282.pdfIn PDF document text
    • http://sethel.xyz/17332628542epg5p.pdfIn PDF document text
    • http://blablablacar.online/54908108583whnhm.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/waxegatulo/lakunevosaruki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97c5dc11-55cc-4a5c-b794-9e6b5569ed20/93316382780.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/mifidinasakokuletazisoze.pdfIn PDF document text
    • https://c18d9829-3add-4afa-bc87-35007fe3998a.filesusr.com/ugd/70c1ec_e0d5df59a0ee4e708607d5524b9a3a3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/how_to_put_a_ribbon_on_a_gift_box.pdfIn PDF document text
    • http://relivoziz.atwebpages.com/sadisi.pdfIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_828a953580cf41abb0ca7b7dcab9d493.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4ed523c-a662-4782-a92e-13509135d822/how_do_you_capitalize_fixed_assets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f5d2f24-fb55-410f-8508-81071549a794/83638822301.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/piriformis_injection_under_ultrasound.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_off0000c4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DA 5268 bytes
SHA-256: 97c1be2ec54de1b7dae2681fd82de1dd490c0cb1ec6286aa51fdda2349172c11
font_01_sfnt_off0000d6be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6BE 10972 bytes
SHA-256: 0c859f56d3b29449f567693239e3a473b97ab175f12a1f87ab9310cd0f3f0bad

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