Malicious PDF — malware analysis report

Static analysis result for SHA-256 548458d73bb644cc…

MALICIOUS

PDF

67.8 KB Created: 2021-02-27 09:58:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9def1bd73f2ddf3cef8978f8dabade16 SHA-1: 8e898040ea5a95cd82cc52dc990e2fbdb9cbffb5 SHA-256: 548458d73bb644cc2deb5bac03cfd590ad8751540b749e1f77dd91260317d16e
136 Risk Score

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://bologen.ru/wix?keyword=glencoe+geometry+chapter+10-6+skills+practice+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446921/normal_601174f423502.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/rDVCIha/stickman_falling_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408851/normal_5ffd3b33f0846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421330/normal_600c8262da159.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_60146ee121f09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392651/normal_602b94e837a70.pdfIn PDF document text
    • http://tadaziwazifumiw.iblogger.org/harlem_to_be_answered_poem.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/hjdyjb0/juripilim.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/musoxifuvitalo/wodazuzutekegobisodekera.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/41442016431.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/duwaza.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/64768239589.pdfIn PDF document text
    • http://xofuzugavup.epizy.com/52443374674.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/cg_songs_mp4.pdfIn PDF document text
    • http://xesiduzivodugi.epizy.com/30692361074.pdfIn PDF document text
    • http://xiradev.rf.gd/tusakazinidasuribu.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_off0000cb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8F 6016 bytes
SHA-256: 66207c2efde84761645389f731d5f60ed73d7a898878b9c4f2849f5bff768a35
font_01_sfnt_off0000e006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE006 9820 bytes
SHA-256: 2b36ce8591b7fd709eb064ed3e8aa54803ebe2cf649edcc7bd44f83e05a472bf