Malicious PDF — malware analysis report

Static analysis result for SHA-256 555b926043808a74…

MALICIOUS

PDF

73.6 KB Created: 2021-01-13 17:08:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cba3031451546e50cd5e0015cb8ebcfd SHA-1: aa1adf4189042c73d42be42e1c79ead5f1f1384f SHA-256: 555b926043808a745a9b67b4c9dfe5ea08ff9b7831ff168c4ea79b2643cbec25
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link to a known malicious redirector, which is likely intended to lead the user to download unwanted software, possibly disguised as a legitimate program like 'wondershare filmora 7'. The presence of a visual download button further supports this phishing lure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://gettraff.ru/aws?utm_term=wondershare+filmora+7++full+version In PDF document text
    • https://static.s123-cdn-static.com/uploads/4382966/normal_5fcf6c3ce0768.pdfIn PDF document text
    • https://cdn.sqhk.co/wovedajuraki/hfgfhbN/ruwekotozirebugafunikafu.pdfIn PDF document text
    • https://cdn.sqhk.co/lugizumevemu/gjgg1ic/65197616084.pdfIn PDF document text
    • https://cdn.sqhk.co/fexejikexew/ddUpjdh/lolewokam.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425926/normal_5ffb6e0871e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_5fb55ede6839a.pdfIn PDF document text
    • https://site-1166680.mozfiles.com/files/1166680/50_50_partnership_agreement_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386095/normal_5fabd65a09cd6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394060/normal_5ffd4e637d7c1.pdfIn PDF document text
    • https://cdn.sqhk.co/jumupebuvi/Zgiricl/88039017545.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/mokuwanibof/balance_sheet_significado_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/case_study_presentation_ppt_template.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_off0000e359.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE359 5300 bytes
SHA-256: b9a25d6ba32aa63210e835be89acc5a4c1d671a06e89507f0141f8345512ae8c
font_01_sfnt_off0000f551.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF551 10752 bytes
SHA-256: 083b239ebebd62c58244fc692cff8290e6c0e33b897c93a382e965630158ca9e

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