Malicious PDF — malware analysis report

Static analysis result for SHA-256 45116aa21245d156…

MALICIOUS

PDF

91.6 KB Created: 2021-06-09 23:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 13af060da6eabeb54bcc8bd1e259c911 SHA-1: 51678210a6be72a5ecf3e46fce30c447b43c7bcd SHA-256: 45116aa21245d156264d1a202106ba385cae38270b4d22c66d02b43a7917cbe5
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of external URLs implies the document is designed to redirect users to potentially harmful sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://garglob.ru/pbw?utm_term=exercices+corrig%25C3%25A9s+physique+chimie+3eme+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4453719/normal_60078ecf0d186.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477386/normal_5fc6056f23901.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421639/normal_60bdb156256bc.pdfIn PDF document text
    • https://sivowudu.weebly.com/uploads/1/3/7/5/137513174/fijawok_fapunopip_xekaromewo.pdfIn PDF document text
    • https://buzokiki.weebly.com/uploads/1/3/4/8/134853803/7082e62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369308/normal_605ee44dce12d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454973/normal_5fd6243156dbf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457849/normal_6050d211a165e.pdfIn PDF document text
    • https://ferafavobob.weebly.com/uploads/1/3/4/6/134671558/88d60a60b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449965/normal_5fc59d8061fc5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_6022115ff3b53.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366312/normal_603eab08e8adb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445118/normal_5ff845d1cfea0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443357/normal_5fc7f7ba79a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479454/normal_60bc9ac4360c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393349/normal_605959ee119b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369775/normal_5fe3ee94c1b9d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401519/normal_60325ec7657c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466666/normal_6043eb6709db0.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/9edc375c-50e4-4ca6-9ff4-2cbc1dbc2f6a/pebetatogav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfc385cc-4a1d-490c-803f-f6c383797d5a/what_is_the_synonym_of_progress.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_off00011259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11259 5580 bytes
SHA-256: b88060a7e0396423e621117e03bd527980c8bd1ac388d7036bdd2d9069ba4914
font_01_sfnt_off00012515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12515 13680 bytes
SHA-256: fdf3edae42717311fff83f96fcc75095d1866b076ced6f5376ed4c1f0e5ec6a8
font_02_sfnt_off00015071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15071 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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