Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b550f044395e50…

MALICIOUS

PDF

71.3 KB Created: 2020-11-13 03:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 36f5cec9d48360e97c8fa50de77af5c1 SHA-1: 608b8b61a3ac64b76667c6e338fb99fa4eb71efc SHA-256: 06b550f044395e50183f9048f491a7587baa8c557eaa58a7e0a6b968f02183fe
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-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.
  • 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/123?utm_term=data+science+for+business+pdf+espa%25C3%25B1ol PDF link annotation
    • https://nirejabepifu.weebly.com/uploads/1/3/4/2/134266024/1292308.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/f0a02171159fa43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_5fab95cf33589.pdfIn PDF document text
    • https://digulowewuw.weebly.com/uploads/1/3/4/3/134363346/jabafupatijoli.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460266/normal_5fa9ddee5ca57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377113/normal_5faa560ba2de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f90cc09df351.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/0f866d99-c32c-4e84-86ff-eda76bddf906/68553136155.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e1aba415-84ee-4326-a85e-56f3e5749249/sonic_cd_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49ac0e4a-d9bd-46b0-9014-09272b9c450d/jiangdong_jf168_5._5hp_engine_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3285f882-ecc5-40dd-b046-ef79aa1e2d88/super_smash_flash_5_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfb7ba2b-0314-48eb-9aee-1bfbd70160b4/lilonekezoruvapevubenuv.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/marvelous_designer_tutorial_espaol.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_off0000d6c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C0 5500 bytes
SHA-256: 6bad5ffe335392ebab4eba4475f2fb5d5a1c0e5e4772304c49ea65c1498e71a8
font_01_sfnt_off0000e93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93F 11288 bytes
SHA-256: bb40755148c70901d64e76c5539e3180cb3c197ccba11f9a4042b22fb3f09081

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