Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b5990abe8a85c7…

MALICIOUS

PDF

72.3 KB Created: 2021-03-03 09:17:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6fbae08aeb6111f42a30ce704cb9ff62 SHA-1: 792e71a76c42674b6a8686bbc0bdadeec804d238 SHA-256: 18b5990abe8a85c7162f72b1d0d8549ddab4cb1f600f8a53f83fb20e554e2ccc
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://xajibur.ru/award?keyword=john+deere+48+inch+mower+deck+schematic PDF link annotation
    • http://vavawosasote.iblogger.org/25960378557.pdfIn PDF document text
    • https://gigufeti.weebly.com/uploads/1/3/4/6/134633464/sovutazigoj-nagotezane-mulojagajap-pakogurivifir.pdfIn PDF document text
    • http://jafixane.iblogger.org/harga_dan_spesifikasi_notebook_acer_aspire_one_722.pdfIn PDF document text
    • https://cdn.sqhk.co/kitujesijak/difuJjh/lilonibekude.pdfIn PDF document text
    • http://nizuloxodiza.iblogger.org/dashgum_free_bootstrap_admin_template.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/dEgfSje/street_basketball_world_league_mod_apk.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/nolarifaforuxop/ounces_to_pounds_conversion_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/dusined/godfather_speak_softly_love_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/tekef.pdfIn PDF document text
    • http://pudekixepubaz.epizy.com/pupatodekutif.pdfIn PDF document text
    • http://kuzebelinebofe.epizy.com/chonburi_font_free.pdfIn PDF document text
    • http://sivopob.epizy.com/88856889481.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/indian_beautiful_girl_wallpaper_pictures_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/watch_free_movies_offline_on_android.pdfIn PDF document text
    • http://bivadalov.epizy.com/nivemudabonisonefufevi.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_off0000ddcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDCD 5572 bytes
SHA-256: d2e96f1553035d0a377f655de9669cc30f2acba06935100283067ee3d84964a5
font_01_sfnt_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 10368 bytes
SHA-256: f2b756ab9ba94c448eaca7564309e73f63718955f64090d708ba59a53fa65759