Malicious PDF — malware analysis report

Static analysis result for SHA-256 75052a604e25ddd5…

MALICIOUS

PDF

78.3 KB Created: 2021-01-30 13:40:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 520fb5a3cfa9430959877daba4b00508 SHA-1: df66db190983539fd0b8ed41fde3943298b616fb SHA-256: 75052a604e25ddd54382efc2c64d732949dfc7edf25ebc0e3b8fd296ccbb2e36
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wb?keyword=youtube%20eagles%20greatest%20hits%20live%20concert PDF link annotation
    • http://lojasamericanasbr.com/ninja_masters_codes_2019lo889.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/jgiZNjg/thai_royal_family_news_2020.pdfIn PDF document text
    • https://nigoriwidoke.weebly.com/uploads/1/3/5/2/135296580/xodigodotuzekalawaz.pdfIn PDF document text
    • http://ketrovk.xyz/radio_online_romania_magic_fmku07a.pdfIn PDF document text
    • https://cdn.sqhk.co/lolumebitana/cBjf0jg/free_ringtones_for_iphone_6_straight_to_phone.pdfIn PDF document text
    • http://adv-workshop.site/10216118290opgih.pdfIn PDF document text
    • https://selijemex.weebly.com/uploads/1/3/5/3/135335383/615800.pdfIn PDF document text
    • http://twoup-viktoria.online/bixomimosusiu87k4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416792/normal_5fe0a8571b654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366665/normal_5ff8b71182484.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/rorives/51027825078.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/d_alphabet_wallpaper_free.pdfIn PDF document text
    • https://s3.amazonaws.com/marimejerebo/kali_linux_partition_disk_manual_dual_boot.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/beginner_gym_program.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/behind_the_neck_press_form.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_off0000ea69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA69 5220 bytes
SHA-256: 9daf3b400bd68b9d49e825f6ad1948deab689c33fd2c56cdb16718c14449fb1a
font_01_sfnt_off0000fc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 15584 bytes
SHA-256: 7494eeaa8cebc131d8723474efef3e519c02a66cbf62b2a8d815772f49a3d2e0