Malicious PDF — malware analysis report

Static analysis result for SHA-256 22be7729283c9933…

MALICIOUS

PDF

72.3 KB Created: 2020-12-04 06:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b61c55558cb3a30321982d988c0f9a30 SHA-1: d94843c1aa85eaeaa0842b8b5a4b733a7a8cdd0f SHA-256: 22be7729283c99334c16d9873872ab9c9c9caea705abe56296abbac6ee8b74f4
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://traffset.ru/strik?utm_term=senpai+and+kohai+language PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5fbfaf0a2743c.pdfIn PDF document text
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/5c5f17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497071/normal_5fc33d68bc5fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420031/normal_5fb67685544c7.pdfIn PDF document text
    • https://zolefixu.weebly.com/uploads/1/3/4/4/134432518/7980104.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450896/normal_5f9ee95e9f531.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5faf7799cdf84.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b5364199-aa17-44ed-b285-60d576ee5772/assetto_corsa_user_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc7b8b25426f52a30e0d42f/t/5fc80339ce516817963171d3/1606943545181/no_man_s_sky_vr_ship_controls.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc066c960f2895dc1e54813/t/5fc73dbe9dfc2a40451bf974/1606892990627/carx_drift_racing_pc_download_full_version_free.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/81310844580.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/korean_alphabet_worksheet_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf60ef3c6ccf69f3562259/1606377712103/divejimemimosekit.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe07676457125654011d14/1606289256230/the_light_fantastic.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d75bbd14ff0dd2b5e666/t/5fc511e94e98326c02b1b74b/1606750698910/persona_5_yusuke_guide.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD336 4916 bytes
SHA-256: 21a528187c3cebca53a0ba985327c9e2171b1075d3b250f69fc71472d8fbde18
font_01_sfnt_off0000e3d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D9 10124 bytes
SHA-256: 8d8aa0915d6451af7d73dc2f8e065cfaea6b5a877fe8f99fa30cb5253b97da33
font_02_sfnt_off00010692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10692 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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