Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbda2f70575c1328…

MALICIOUS

PDF

76.1 KB Created: 2021-05-25 06:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05b23829f4406072c3a7e71d418f1535 SHA-1: e866d72bf3b59e2a15f945b1140b4483b07e34fd SHA-256: bbda2f70575c1328deb485435c613eee645acb169d58fa5a59632d914c4f1b2c
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or trojan distribution. It contains a large number of external links, suggesting a link farm designed to redirect users to potentially harmful content. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URLs indicate an attempt to exploit users through deceptive content, likely leading to further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cdn-cms.f-static.net/uploads/4367687/normal_602bb0fc19ec8.pdf In PDF document text
    • https://pubogovivewata.weebly.com/uploads/1/3/2/3/132302724/mosogowadaxufofe.pdfIn PDF document text
    • https://dogonojibot.weebly.com/uploads/1/3/1/6/131606640/a9d1e2ea7.pdfIn PDF document text
    • https://radifepibonavu.weebly.com/uploads/1/3/2/7/132712096/votosut.pdfIn PDF document text
    • https://nunosutelakib.weebly.com/uploads/1/3/1/3/131383720/3a08104.pdfIn PDF document text
    • https://ganupedudajoz.weebly.com/uploads/1/3/4/5/134586443/tavedet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465123/normal_5feb7d39f137e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393358/normal_5fdeefaf2da55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405185/normal_6004f50e92765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449599/normal_5fd2968c3d462.pdfIn PDF document text
    • https://zaxifugerabapaz.weebly.com/uploads/1/3/1/0/131071175/fekemejasubidoko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447431/normal_5fd2d89675994.pdfIn PDF document text
    • https://vuxizufekek.weebly.com/uploads/1/3/4/8/134864169/24cf18990be.pdfIn PDF document text
    • https://malafusid.weebly.com/uploads/1/3/2/8/132815748/d9d15cfcaf74.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484993/normal_5ff1cac22aee5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503197/normal_6032fa980a652.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=kali%20linux%202019.4%20download%20iso%2032%20bitPDF link annotation
    • https://s3.amazonaws.com/davubewu/11702801863.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/diablo_2_lord_of_destruction_patch_1.13_d.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/dedilopesoxizagar.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/23724969840.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/61595381479.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/another_eden_guide_monster.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/daniel_plant_killer.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/gatehouse_electronic_lock_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/nefefutizalujatupolitoki.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/gezegesexod.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_off0000e98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98D 5760 bytes
SHA-256: deaff57abffbfa6706fb7a20d0d31bbc8481620fbbe2e53d4f507685a96d0201
font_01_sfnt_off0000fd57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD57 10804 bytes
SHA-256: 76b25c0f59c66f8eec94fcd3f601d147d682406327b4ddae508e51e947b01a7a

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