Malicious PDF — malware analysis report

Static analysis result for SHA-256 05f16e06fcde136b…

MALICIOUS

PDF

102.9 KB Created: 2021-02-23 10:44:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f79fffe7840ed6a626fd656a043be74e SHA-1: b3fdac22e501103c7d56c0e048ab5f435dd57711 SHA-256: 05f16e06fcde136b689ae93afcb29e87ebcfc8daff8f766632a8f99c825ded40
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent link pointing to 'baarspo.ru', suggesting a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or distributing further malware. Although no scripts were directly extracted, the PDF structure and heuristic firings point to a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/strik?utm_term=how+is+huck+finn+described PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478687/normal_603122801d409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ffd0084bd4c6.pdfIn PDF document text
    • https://zetojaxonafavop.weebly.com/uploads/1/3/5/3/135309172/weluwowikuz-savilisiga-wupamegosu.pdfIn PDF document text
    • https://xikobidena.weebly.com/uploads/1/3/6/0/136097244/4f54ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378379/normal_6027c5c1c98fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_600b231279c66.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528959/normal_5ff1dd49bffed.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/dipafuxe/new_south_movie_2019_mp4_hd.pdfIn PDF document text
    • http://duloduxu.epizy.com/tugiradogurejofex.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/acapela_tts_voices.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/84971713944.pdfIn PDF document text
    • https://s3.amazonaws.com/purufiz/didajosuzoremizajujuwotit.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/2019_chevy_equinox_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BBC 3060 bytes
SHA-256: 5d23fa2c8093e330915aa60e27bdc94fff3692263c05e5f51ee41da8a51a24a3
font_01_sfnt_off00015699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15699 5124 bytes
SHA-256: e24a91aff6b22bb1eec30380a353b06783a1776e6ee42765473ae86f398eab93
font_02_sfnt_off00016812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16812 11220 bytes
SHA-256: 9991291c4b3c003284e0a40d0caaf3942778c0a78545fceda2d83fbae43df609

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