Malicious PDF — malware analysis report

Static analysis result for SHA-256 1521f5048efec6c9…

MALICIOUS

PDF

69.6 KB Created: 2021-02-23 11:27:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 43531652aff014a12a7298de56284930 SHA-1: 91c88583887c6b49ea06617a436c6fe623b88760 SHA-256: 1521f5048efec6c9a867c6ffea5bcb269b469e6bbcd8effb7e4c39bc8725da23
196 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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/123?utm_term=is+microsoft+flight+simulator+vr+supported PDF link annotation
    • http://fufikozulubus.22web.org/gone_with_the_wind_characters_ranked.pdfIn PDF document text
    • https://cdn.sqhk.co/rowazazapa/ia5jchb/virus_protection_for_your_computer.pdfIn PDF document text
    • https://saranadizalexe.weebly.com/uploads/1/3/0/9/130969301/redazaxagafuvutisibe.pdfIn PDF document text
    • https://janolonixo.weebly.com/uploads/1/3/3/9/133987325/subevixuzuvegirob.pdfIn PDF document text
    • https://fuwurobo.weebly.com/uploads/1/3/0/8/130814642/vozirasamidibo.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/VEOB7HG/52433961894.pdfIn PDF document text
    • https://cdn.sqhk.co/merivexasug/Khgdpn1/best_white_noise_machine_for_baby_sleep.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/kujapomib/50470701333.pdfIn PDF document text
    • https://s3.amazonaws.com/pasutiz/71646369174.pdfIn PDF document text
    • http://fobonerenajob.epizy.com/luxury_travel_guide_awards.pdfIn PDF document text
    • https://s3.amazonaws.com/rozebofukixus/pugixevavilixatajadiwilo.pdfIn PDF document text
    • http://togewogovimome.epizy.com/navy_brag_sheet_template_for_evals.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/gilorubapuda.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/direct_and_reported_speech_worksheet_year_4.pdfIn PDF document text
    • http://rujidita.rf.gd/86254889572.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_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 5568 bytes
SHA-256: 551f29adb904de565cf4cab21f07ea54e35ea18d471c9aba1ace414d5043be66
font_01_sfnt_off0000e3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AD 11312 bytes
SHA-256: a56fd98a9da39031a706b2239387ceac1006199ddbfefe06cc5a31f9be65dc46