Malicious PDF — malware analysis report

Static analysis result for SHA-256 347ec0ef4f729625…

MALICIOUS

PDF

67.5 KB Created: 2021-02-24 15:10:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 04285ce8c724e86dbec01edebcf9af22 SHA-1: bb0b3ce56163a36d04cff7f0c075dbf9b0ff725e SHA-256: 347ec0ef4f729625eec98068b0771fa48ac50712a2125c19592ccdb7d3808181
136 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan distribution attempt. The embedded URL, https://seumenha.ru/123?utm_term=how+to+program+a+radio+shack+scanner+pro+2015, is used as a redirector, likely leading to a malicious site. The document body, though heavily obfuscated, contains text related to programming a scanner, potentially serving as a 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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://seumenha.ru/123?utm_term=how+to+program+a+radio+shack+scanner+pro+2015 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5fd81839b6684.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5fcdbcbc0284a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485939/normal_5ff8f36ccc615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408984/normal_6022be6004980.pdfIn PDF document text
    • https://cdn.sqhk.co/vilubofi/dBhdP9n/does_lowes_have_open_house_signs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380857/normal_5fd5f9ba0bd7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_602c07c8aa7d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405946/normal_601a6de5ee47a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380680/normal_600550b7aff66.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/ifZKigy/gallery_vault_app_free_download_apk.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://s3.amazonaws.com/jotizifime/nofedikirosirapap.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/closed_ended_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/buffalo_sauce_nutritional_information.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bdcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCD 5808 bytes
SHA-256: fbf0c7fd5ce8ecef5c8752b5867ff576f72b391fbd4a836976c86107d02201db
font_01_sfnt_off0000d183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD183 9724 bytes
SHA-256: 201eb85d70c860455157a98bf996d69753fc1baca483754c85b8aa813992fa58
font_02_sfnt_off0000f2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3