Malicious PDF — malware analysis report

Static analysis result for SHA-256 7909f1f7dca1bc83…

MALICIOUS

PDF

68.9 KB Created: 2020-11-20 07:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: c83e339966821d8943ccce31e92bbc62 SHA-1: 484eeb578b3065289d6536502ac783ae8788b392 SHA-256: 7909f1f7dca1bc83a2c9e7de07cae6d64e1e8309428b96c1cfa3992c4ddcf63c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO spamming operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious content designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffi.ru/aws?utm_term=vr+escape+game+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366407/normal_5f8a699b17078.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/2324205.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368962/normal_5f906d9f5974b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446027/normal_5fa179e8734ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404297/normal_5fb67215285ad.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5fb03ee4cd745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_5f8c9223b7898.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/lewudebe-wiberiso.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/varolexexus/epic_7_discord_tier_list_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/consul-_template_nginx_upstream.pdfIn PDF document text
    • https://s3.amazonaws.com/gavapozalilup/android_emulator_freezes_computer.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/platform_movie_cast_and_crew.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/natixokegabapuzo.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_off0000cfbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFBB 5252 bytes
SHA-256: 03c8d33e3caddd5ac46a932bbcd70bfacec74687dd83420666fc7e3e75d93cf4
font_01_sfnt_off0000e190.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE190 11044 bytes
SHA-256: 34f2de75cc501f1edec6329b4332290ca07eb9eaa151d19f198625dfc4e7318b

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