Malicious PDF — malware analysis report

Static analysis result for SHA-256 2121a40aa35d57f3…

MALICIOUS

PDF

72.4 KB Created: 2021-02-27 02:15:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 2410beacfcb6063d94866637f08a6475 SHA-1: f84baabf17c0ea38965ba6b64764e6e5832f1723 SHA-256: 2121a40aa35d57f3aa719dc3ffbece32a46086038f5103fda85fcbf0dcee335f
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/award?keyword=how+to+get+dividends+monthly PDF link annotation
    • http://0fruit.space/6675711262j81et.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444850/normal_6039845db1999.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/gdhh0cA/bridge_builder_simulator_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/ifgiheR/preschool_cross_coloring_sheets_for_spring.pdfIn PDF document text
    • http://contentmedialiteracy.com/zegutubunurijambg7ma.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447888/normal_5fc5d64749516.pdfIn PDF document text
    • http://mmeueue.space/mordheim_warbands_skirmishkdaoo.pdfIn PDF document text
    • http://counterman.ru/tafivekuxibomusaxckxnn.pdfIn PDF document text
    • https://cdn.sqhk.co/fabetojowuje/Xidh4jf/absorption_definition_medical_terms.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/tobito/35495983158.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/64688565782.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/vojoranivefuxibabuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/new_soul_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/california_dmv_forms_of_id.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/kerala_hindu_marriage_certificate_format.pdfIn PDF document text
    • https://s3.amazonaws.com/xopugup/22506782220.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_off0000dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFC5 5148 bytes
SHA-256: d9cec81fe24faabd464cd179351284bab5cd3c768d26611dab841180222a2cae
font_01_sfnt_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 10456 bytes
SHA-256: 10748fcc5619a18bcbcdebdac3bc01f4a6b357e536e632d9a9f5bc97f36c2978