Malicious PDF — malware analysis report

Static analysis result for SHA-256 33bf55a0c3a51e2b…

MALICIOUS

PDF

73.4 KB Created: 2021-01-29 07:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9b85b96e578fe3fa05de1bbb256871a9 SHA-1: a9ec42a46965ccc35e1f612ed25fdc05a7b029c6 SHA-256: 33bf55a0c3a51e2b02ec7c9950579c80e7cf5f1f0e3da6de9079f283b7b7432f
194 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=kobe%20and%20gigi%20jordans%202020 In PDF document text
    • https://waruzakelejabu.weebly.com/uploads/1/3/4/6/134600446/15bbda54b1a.pdfIn PDF document text
    • http://50offstore.info/mimizay6a9r.pdfIn PDF document text
    • http://0fruits.space/new_rock_music_october_2020jh9l4.pdfIn PDF document text
    • http://rekipeva.iblogger.org/xidudofuxuxur.pdfIn PDF document text
    • http://thiswaytovogue.com/tv_box_h96_max_android_9._0u7t0n.pdfIn PDF document text
    • https://feroraja.weebly.com/uploads/1/3/0/9/130969346/zeremeliliji.pdfIn PDF document text
    • http://cardio-active.site/que_es_direccion_en_el_proceso_adminyxmqz.pdfIn PDF document text
    • https://bigififipajug.weebly.com/uploads/1/3/4/7/134709095/9840126.pdfIn PDF document text
    • http://manthoughtswebsite.website/xexotiximirevxwjeq.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/183584.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/nopomewegobij/61426314045.pdfIn PDF document text
    • http://koxaxinum.epizy.com/alcatel_7750_manual.pdfIn PDF document text
    • http://rejefuwozumij.rf.gd/83212216227.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/discharge_summary_report.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/januvibidutusekifujup.pdfIn PDF document text
    • http://rufabededaloti.rf.gd/appozhum_paranjille_song.pdfIn PDF document text
    • http://ziboporo.epizy.com/accident_investigation_report_format.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/wepezuwizenegik.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_off0000e2d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D6 5420 bytes
SHA-256: 8caf725ee4596450740f040c51b1f65ef74e129c0305067bbdb96237dae6dcb2
font_01_sfnt_off0000f55d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF55D 10384 bytes
SHA-256: cb0077f3c176cade91b253b06531b3fc39dd0e35324ba499e0e88e53c23835e9