Malicious PDF — malware analysis report

Static analysis result for SHA-256 96599b0fb5231164…

MALICIOUS

PDF

69.7 KB Created: 2021-02-15 06:23:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 36b68fb7a3552d0cfe9b9508b862941e SHA-1: 139b4bcaf445e11573d483a9d5056903fca407d9 SHA-256: 96599b0fb52311645ccbba7b331319956798333b04ef59b1a869475af7057fcf
196 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
  • 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.
  • 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://maypoin.ru/wix?keyword=finding+density+worksheet PDF link annotation
    • http://help-bluebadgecenter.com/avg_for_pc_windows_10p4nm1.pdfIn PDF document text
    • https://cdn.sqhk.co/nabokufawogo/aigOwk6/revenge_of_sultans.pdfIn PDF document text
    • https://cdn.sqhk.co/lexuxeza/fQghgiA/ribadiponusunizogukapen.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_5fcd3642c52f4.pdfIn PDF document text
    • http://dragonflysagewellness.com/xufipuvoniyqmvt.pdfIn PDF document text
    • https://giwemonuxir.weebly.com/uploads/1/3/0/7/130775654/pixokolopori.pdfIn PDF document text
    • https://cdn.sqhk.co/fujikapoji/jiOiaia/covid_19_home_schooling_memes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411932/normal_5ff79bce9a263.pdfIn PDF document text
    • https://cdn.sqhk.co/jekunesoru/ijifcii/opera_bale_ankara.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/gwNghgc/suppository_medicine_for_fever.pdfIn PDF document text
    • https://cdn.sqhk.co/lokalofobox/e7jc6U6/54248777424.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403118/normal_5feb96873f245.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462379/normal_5fd0437f77811.pdfIn PDF document text
    • https://cdn.sqhk.co/xelalizogim/8rhjKji/xujoxenev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_5fd662c978138.pdfIn PDF document text
    • https://cdn.sqhk.co/jotenitix/l4Bjfji/mit_aerospace_engineering_admission_requirements.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC85A 2940 bytes
SHA-256: cec29187fcb9d6976463e8b7003bb736eae91d1153adf034b378cf263d51323f
font_01_sfnt_off0000d504.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD504 5060 bytes
SHA-256: 1cda20666cb1e55e431bbaf37c3a04ad352098b95dd805fd33a4cf8f2a3f2b8b
font_02_sfnt_off0000e655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE655 10244 bytes
SHA-256: f5c71e28294f548e26d6cfbbf5a2984c1ab5bf25e2f99574107334629263675d

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