Malicious PDF — malware analysis report

Static analysis result for SHA-256 2450b7d9dea6c74f…

MALICIOUS

PDF

79.1 KB Created: 2021-02-25 04:33:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2e4332a5613cdd0db39f21b3955e2ed0 SHA-1: ff396676c4c9b384e1b5cde51cdae58c39a99aed SHA-256: 2450b7d9dea6c74fba449af1f6d4a0a052388694e23041e01254a392bf74b1a1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous external links, flagged as a link farm, and is identified by ML classifiers and ClamAV as malicious phishing content. The document body, though partially obfuscated, suggests a lure related to a literary excerpt, likely intended to direct users to malicious URLs such as https://jottigo.ru/strik?utm_term=extrait+camus+le+mythe+de+sisyphe for further exploitation.

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://jottigo.ru/strik?utm_term=extrait+camus+le+mythe+de+sisyphe PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376372/normal_5fd241123548d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_60167e4890662.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426547/normal_6032dddc97732.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453115/normal_5fed114e5b9e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487897/normal_5fe0b4002cbb4.pdfIn PDF document text
    • https://setopotuvojinow.weebly.com/uploads/1/3/4/8/134877086/8109915.pdfIn PDF document text
    • http://antonioit.fun/71268043099gk1qy.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/5993118.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392470/normal_5ff9e6df4e13e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481820/normal_5fdebf979d7c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafodix.myartsonline.com/zodivalawenikovaxuz.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/pm_awas_yojana_form_online_apply.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/harry_potter_and_the_philosophers_stone_netflix_australia.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/small_baby_whatsapp_status_video.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_off0000f659.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF659 5440 bytes
SHA-256: 9c030524b52bbaaa1267aba02f783e99e278bbeefe5d9c4a95e9eb2ef04c9202
font_01_sfnt_off000108b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B8 12364 bytes
SHA-256: 7536b012b2ffd3ea320b42c7e1b6ab5db01a07b89a5e1f3b3d5e26d56b7c3abd

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