Malicious PDF — malware analysis report

Static analysis result for SHA-256 d94ad22a8132e041…

MALICIOUS

PDF

73.2 KB Created: 2021-02-28 18:19:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e565f59c22dffce2faee22965710de9e SHA-1: bc88d5f572efbd0bce0c742873e17d808ab68fb0 SHA-256: d94ad22a8132e04199e8081b0e7ee51afbfe04a4fd3a5e2f30dc845e87aab8de
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/award?keyword=great+wall+of+china+project+management PDF link annotation
    • http://negeduji.66ghz.com/cbse_10th_maths_book.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408875/normal_6008cf7881486.pdfIn PDF document text
    • https://ravuluzezufex.weebly.com/uploads/1/3/5/9/135956854/degigepilikumone.pdfIn PDF document text
    • https://cdn.sqhk.co/tuxonewebuke/dlPkcjg/wokolamilejopelegulobat.pdfIn PDF document text
    • https://cdn.sqhk.co/jasuxerazifo/ighgUkt/bts_dna_song_ringtone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/ijijjjo/yeet_gif_lion_king.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/jbK8Mib/pixel_kingdom_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366961/normal_5fe2c360ee4ba.pdfIn PDF document text
    • http://carins.info/losaxesijasufewixobivu6bh62.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/Cihgfhf/tagewu.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/nitizobuv/accepting_a_job_offer_via_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/wavatusibiru.pdfIn PDF document text
    • http://lulojoduvos.epizy.com/13649428793.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_off0000e274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE274 5448 bytes
SHA-256: 174ffc90697cbaff92a75343b32b4567b7a2341fdaa75606efacb6c76cdc5511
font_01_sfnt_off0000f4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F4 10116 bytes
SHA-256: 5389ea14cd7ea87d1bf72c3fa7b4fad66eee6d7c1de3de714c9ca9f30ef7d67d