Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca04d8c9567c099f…

MALICIOUS

PDF

72.0 KB Created: 2020-11-29 13:23:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 90ff1ea6915fd4ba0ccd8ded82e3b01a SHA-1: 1b47f49c02b46467793473826da7e59f9348d0fc SHA-256: ca04d8c9567c099f9ba254623f48140048d2359b80478d6859a03c19cc183bb1
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, suggesting a link farm designed to direct users to malicious content or downloads. The presence of a download button lure further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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
  • 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://trafffe.ru/123?utm_term=flexispy+apk+download+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5f93471fe571b.pdfIn PDF document text
    • https://bolififona.weebly.com/uploads/1/3/4/3/134316640/d41d8c3e6c8aff.pdfIn PDF document text
    • https://ziridizozavixik.weebly.com/uploads/1/3/4/4/134400570/d74d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484835/normal_5fc364004d758.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467285/normal_5fa33ce50a578.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/3ac78b13b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368244/normal_5fa029a54e19e.pdfIn PDF document text
    • https://xonujofepip.weebly.com/uploads/1/3/4/3/134385468/ee916700.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/lodazojamuva/math_superstar_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/overtime_authorisation_form_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/autoresponder_madness.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/aranjuez_guitar_sheet_music.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6F 5408 bytes
SHA-256: 436ddd63eae4b7b7552eff61f3dfcd71b2be567be89a26b961ea4f9b5832f88b
font_01_sfnt_off0000ef05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF05 10652 bytes
SHA-256: 7f1c3d04db9d52735072e191da93d757ed15d75c62d11f2938612addf26d0000

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