Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de35b8847709e04…

MALICIOUS

PDF

67.8 KB Created: 2020-11-13 05:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7614d316c43a47d0997961d3f1ebda0a SHA-1: d559e0f704b6a12f95cdb699a23e808a2dc0d533 SHA-256: 0de35b8847709e042f7fd90604b6b29adc470b03eaed9d9493353a510e46fa03
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://traffset.ru/strik?utm_term=bose+soundlink+software+update PDF link annotation
    • https://lafefozusut.weebly.com/uploads/1/3/4/5/134597047/4140140.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8751128dc8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dozuga/unger_bible_dictionary.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/civ_6_guide_steam.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/bulakugozupe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e7c7c7a-1b45-4d8a-bf36-366f40ff602e/jirasofa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8955e6a2-a396-4a68-8deb-0db2a88eefaa/21588646422.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/zapumarikebabivavaronik.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/gikosefeluxopavetegalume.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b57de8c-a058-4f27-821e-ba96a36aa752/fifa_16_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/599dc1e9-9a77-4fba-8267-f1db9909d002/painter_poet_bob_coleman.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000beca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBECA 5124 bytes
SHA-256: 4e60be8a07648cef30cd782cfca42d99e73c95d8628fd8f7559a33a6ce62f77f
font_01_sfnt_off0000d051.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD051 10544 bytes
SHA-256: 16699c48e62a22396bdc3a14c417fb2370fe3e27b8ec016c310074621d29788b
font_02_sfnt_off0000f47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF47F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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