Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfca3814dc764c1c…

MALICIOUS

PDF

72.8 KB Created: 2021-02-16 01:20:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2ee6dc28e6803be546fd6865742b3262 SHA-1: 1b27e2e7c895652901e16951366fbf7e4db3cdb7 SHA-256: bfca3814dc764c1ca4336d8956ac63c5b0d09c8411885161238c55f2797dac25
176 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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/wix?keyword=computer+lab+website PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470391/normal_5fd7ded99a667.pdfIn PDF document text
    • https://cdn.sqhk.co/letopoto/ihjfYEe/36369193037.pdfIn PDF document text
    • https://cdn.sqhk.co/sologavabo/uRgc5ge/golf_laser_distance_measuring_device.pdfIn PDF document text
    • https://wigitofeza.weebly.com/uploads/1/3/2/6/132682623/5915930.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469623/normal_60165fd24e19b.pdfIn PDF document text
    • https://cdn.sqhk.co/mekerijiwuv/AOUhbji/35662722595.pdfIn PDF document text
    • https://bivapere.weebly.com/uploads/1/3/4/6/134689139/jeruvuwunewuwuredef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501204/normal_6027239f05617.pdfIn PDF document text
    • https://kakituku.weebly.com/uploads/1/3/4/5/134589995/2823679.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/gfMeSG7/cricket_england_vs_australia_live_streaming.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/goviwigax/serivisibej.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/gidux.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/bootstrap_4_basic_html_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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d167.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD167 4996 bytes
SHA-256: 866f3d4eef284ab6e1a00dee7c0eac44937dbecb1e4c10e31d25016dfb2b1b98
font_01_sfnt_off0000e275.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE275 11088 bytes
SHA-256: 1ec2d030b88d127ac9f7e0aba08760eee118dc1299e269b18ddd92934bc88428
font_02_sfnt_off0001081b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081B 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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