Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9d4453cdd9c20d…

MALICIOUS

PDF

71.9 KB Created: 2021-01-24 20:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 9fe0d95f25a45706f324a634d345e8ae SHA-1: b00849dcfdaa41e4943f63c02f3f6f0e7c3ddabe SHA-256: fb9d4453cdd9c20d4c29ea78d96bf9e03ccbe23fdb4fd0581cd4045263bdefc3
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://traffine.ru/123?utm_term=congressional+record+june+13+1967 In PDF document text
    • http://golifidisonopat.iblogger.org/zilojat.pdfIn PDF document text
    • https://cdn.sqhk.co/nufopusifa/jfm8hai/mobile_ringtones_old_telugu_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/telazaje/igkicfm/cooking_chocolate_for_molds.pdfIn PDF document text
    • http://ovca.space/79088630165tjj0n.pdfIn PDF document text
    • http://nuveclovet.xyz/63872326563jy2ey.pdfIn PDF document text
    • http://olx-delivery.cc/best_names_for_fancy_catsui253.pdfIn PDF document text
    • https://cdn.sqhk.co/jemowevu/0hjvuhh/gun_builders_in_texas.pdfIn PDF document text
    • http://goldstein.capital/68415308749n71u2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wopapaxepesibad.epizy.com/toxicwap._com_vikings.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/88657561982.pdfIn PDF document text
    • http://velumosak.epizy.com/english_to_assamese_dictionary_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/invisible_man_chapter_15_questions_and_answers.pdfIn PDF document text
    • http://pukevekoba.rf.gd/totefuregidatavofezim.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/bexatope.pdfIn PDF document text
    • http://musovulazapa.epizy.com/dijapufipisitizufamil.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/the_humours_of_whiskey_sheet_music_free.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/24486513310.pdfIn PDF document text
    • http://rexerikilo.epizy.com/new_bollywood_movie_trailer_mp4.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_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 5696 bytes
SHA-256: 4156f2cfac6b4c9ca4f47f8a917f6f95a0b9b5cc8d0dada9ebdc8278e6712a23
font_01_sfnt_off0000ef42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF42 10356 bytes
SHA-256: d2bfc42240858a9af53ef5ac7bfd68c15b516fcaa407ee3a3803babe59251582