Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f300f904b82d6e8…

MALICIOUS

PDF

67.1 KB Created: 2020-11-10 10:39:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 26737164ec76db52b5bcf52bdfd9793e SHA-1: db228c6b13fe9a2484115cbee906c6a145b05178 SHA-256: 1f300f904b82d6e8fe3855e265f8b96588e365c1452de70d0f599fa1da3a5b86
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffnew.ru/strik?keyword=sprinter+unblocked+games+77 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414357/normal_5f96fa094a0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389394/normal_5f91ea71c647f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8a938d85483.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369657/normal_5f97d6aabe982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386080/normal_5f8e8fd4674b5.pdfIn PDF document text
    • https://lajojixuvoporor.weebly.com/uploads/1/3/0/7/130738555/8580990.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384150/normal_5fa4cfb93562e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369936/normal_5f8d704d67ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f87a6118439d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_5f9d36f33cbde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9668e962-baa3-4fdf-a95a-68d58e170fc5/mupamuxa.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/folenarabegigusore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac360f2f-d27b-4d26-ad3c-f3495cd9cdfd/tujusujo.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/vuguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bd3ac49-3985-435a-9e97-cbd2992e034c/gulabirobifixidalezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2be1c753-a513-4eab-a35a-6f4eca07accc/19040854709.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 2

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_off0000ae80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE80 5780 bytes
SHA-256: 64e21133b5b178adb2c1043f1ca8a897c7f2d0b5f6dc6195a78f0d0e7e2760b0
font_01_sfnt_off0000c218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC218 9100 bytes
SHA-256: 6ddc99e85187c31269c9188882ac38f3d14a14a3c057885c34ca82374344dc79
font_02_sfnt_off0000e14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE14F 18280 bytes
SHA-256: a446eff41250ab5e97230d3a8f407f1926e8472784e80e4a7e9e5ad135147342

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