Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5505446477a16be…

MALICIOUS

PDF

87.9 KB Created: 2021-03-04 06:55:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: afaf7d29c3bc3983622f03e23342ea25 SHA-1: e2d50d08cc3edd9d6a0ff2ed86afb9f358eea2c6 SHA-256: f5505446477a16bec9f5d6d91be8a699323f76dd02d23fd5c9838124fc29def2
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://druttle.ru/award?keyword=wendy%2527s+bacon+pub+fries+ingredients PDF link annotation
    • https://kefexogutifega.weebly.com/uploads/1/3/5/3/135309882/3255522.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489976/normal_5fe6f2d0d3fff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426066/normal_600f79f22470c.pdfIn PDF document text
    • http://subfamjtii.site/the_apology_line_podcast_release_datee4qff.pdfIn PDF document text
    • http://rte-ita.fun/brisbane_city_weather_reportor3uf.pdfIn PDF document text
    • http://grinallex.shop/exterior_design_in_architecture_yoshinobu_ashihara90nze.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/luworizesupox/indian_tv_shows_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/android_textinputlayout_error_text_size.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/sujelagotiledififa.pdfIn PDF document text
    • http://totuxivez.onlinewebshop.net/yamaha_ypg-635_midi_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/fonudiva.pdfIn PDF document text
    • http://faxiruvud.myartsonline.com/jaxosu.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/23892424938.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/background_wallpapers_hd_1080p_1920x1080.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/luxusumukigif.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_off00011a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A37 5580 bytes
SHA-256: 5168603f66ff58119e74d2e3643a9f6ab3d02caf8a4e4ec8e94bfa9d41ce1d67
font_01_sfnt_off00012d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D59 10980 bytes
SHA-256: e7360d5bfe3f096c8c0013c8025e669a4008dc51e2451185886ce7b15fc6305a