Malicious PDF — malware analysis report

Static analysis result for SHA-256 866e8cff8bbe4e20…

MALICIOUS

PDF

67.8 KB Created: 2021-02-15 15:42:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6755065fa20bafda32300b6983f6b969 SHA-1: 77ad6592dc8e1e23b49de808c913bd9a94b810e3 SHA-256: 866e8cff8bbe4e205fe295e67faa1a37917f644c86026ee41a6721cc3e410d40
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://baarspo.ru/wix?keyword=friction+gravity+and+elastic+forces+workbook+answers PDF link annotation
    • https://cdn.sqhk.co/bewamufara/Vogd5hc/sorumab.pdfIn PDF document text
    • https://cdn.sqhk.co/rawegili/je80OQ2/dofodevog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459325/normal_5fc5f4c00d9d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5fc88b8f1272a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453528/normal_60276906248ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494657/normal_5fea1d30535ac.pdfIn PDF document text
    • http://fosufupivufup.66ghz.com/juwawusoxu.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/hig85Pg/dr._driving_2_game_install_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/hgjKfg4/gundam_wing_heero_yuy_quotes.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/fibesezati/81649907903.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/jurudoladowijabari.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/akademia_pana_kleksa_nuty.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/extra_long_twin_bed_sheets_ikea.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/lisuvegov.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/twin_over_full_bunk_bed_plans.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/benign_prostatic_hyperplasia_article.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/84376536738.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_off0000cca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCA9 5600 bytes
SHA-256: 1b06bb2138786d83d563c80130e37660b4b2d9a92a327cd450ae7f2f9359c613
font_01_sfnt_off0000dfe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFE8 9980 bytes
SHA-256: 8259e37bcbbc0db09bab517c87e9b502baded281ce60a48fb08deab2c76455ba