Malicious PDF — malware analysis report

Static analysis result for SHA-256 2157d6eed36844c4…

MALICIOUS

PDF

76.4 KB Created: 2021-03-03 09:20:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 36a4c1ddbbebed768702bdd4dde1eff8 SHA-1: 7d0389c4c7e3df3c5c77dcdc2fc716bae8545c73 SHA-256: 2157d6eed36844c4344430a3ddd5e751d1859839c1f5b1768cdc5dad9b6c2191
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://kuzutuzo.ru/123?utm_term=bushmaster+xm15-e2s+barrel+twist PDF link annotation
    • http://gukabibus.mygamesonline.org/chapter_7_ionic_and_metallic_bonding_test_b_answer_key.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/jagivilolez.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/what_causes_delayed_gastric_emptying_in_infants.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/excel_for_dummies_2016.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/jafujasiwetid/pumikojebubuxufibuna.pdfIn PDF document text
    • https://s3.amazonaws.com/zizene/jegak.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/aiims_pg_2019_january_session_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/bulbul_ka_bacha_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/uk_words_vs_american.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/zovojasomimuposigazopez.pdfIn PDF document text
    • http://rosajeku.myartsonline.com/making_music_74_creative_strategies_for_electronic_music_producers.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/25698767029.pdfIn PDF document text
    • http://rujidafedisezu.atwebpages.com/warezobuv.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/explanatory_writing_template.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/python_debugger_guide.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_off0000ec1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1D 5612 bytes
SHA-256: 4872d6fb1566c5ee22c0cd70b79be89b40867ae560112048fcf1f823e5772e37
font_01_sfnt_off0000ff31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF31 11260 bytes
SHA-256: 8ba30604eb1cc138902f206bdf19979afcad96d458e30f3180ab300c3ecc99ab