Malicious PDF — malware analysis report

Static analysis result for SHA-256 2da1dd21b8a6022f…

MALICIOUS

PDF

68.7 KB Created: 2020-11-23 17:20:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f3bd96fc56d383fcd8f8d8ffb4066529 SHA-1: 9305c87a1657e507a906d5e749ca5170bda7e6b6 SHA-256: 2da1dd21b8a6022f9d822c695c400c4d24073091fc03705079b86207d20a27b3
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a security-bypass lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://trafficel.ru/strik?utm_term=fl.+studio.+10+crack+torrent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5fa1a636876c6.pdfIn PDF document text
    • https://jekuwetif.weebly.com/uploads/1/3/4/8/134887180/topuvugozoberonava.pdfIn PDF document text
    • https://lixevipilevorox.weebly.com/uploads/1/3/4/6/134634278/f62c446c271c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386074/normal_5fae16373dbf1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476148/normal_5fb491fc9b1a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466376/normal_5fa3d84ab4ff4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426425/normal_5fa0a22292068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_5f9eaa4284446.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/piwupevivotixi/minecraft_bedrock_server_jar_files.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/zofanasipazimupuwe.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/blood_pressure_chart_for_seniors_women.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/93591253281.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/fetevedotidoz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC08 5180 bytes
SHA-256: aaed9a48c8f3ef5471518a9832583642ea9d5b56d79e0e05195e0053e85bb3f9
font_01_sfnt_off0000ddba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBA 12912 bytes
SHA-256: 65650e311eb39e360b4a3ea56278c8bd3b1c18dd693ab596ba962956a8b17a80

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