Malicious PDF — malware analysis report

Static analysis result for SHA-256 6840cffbee45827a…

MALICIOUS

PDF

75.3 KB Created: 2021-02-27 19:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aba7608574ba1950a8455068a5401b14 SHA-1: 9e42ac01f42f69b4afa88aea7b666c004cd8b601 SHA-256: 6840cffbee45827a3944132ebaa8c1ded20086143f9a55b39ed7c684200e6829
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/123?utm_term=graco+my+ride+65+car+seat+expiration PDF link annotation
    • http://sipipewawezizuf.getenjoyment.net/34669115731.pdfIn PDF document text
    • https://tagufonatudivar.weebly.com/uploads/1/3/4/6/134609106/6cba350d8.pdfIn PDF document text
    • http://zugasanuko.getenjoyment.net/what_kind_of_questions_are_asked_in_cards_against_humanity.pdfIn PDF document text
    • https://pibefugaradaxo.weebly.com/uploads/1/3/1/3/131398186/zukinupofa.pdfIn PDF document text
    • http://ylyn.ru/39924056775ldef7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotidupodugi.myartsonline.com/71413593312.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/3939876471.pdfIn PDF document text
    • http://vidodelogedotub.epizy.com/58521816658.pdfIn PDF document text
    • https://s3.amazonaws.com/devuxuzejozam/archicad_16_free_full_version.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/nonton_film_the_postman_always_rings_twice_full_movie_sub_indo.pdfIn PDF document text
    • https://s3.amazonaws.com/kalanejaxutilif/two_fundamental_characteristics_of_financial_information.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/93759120684.pdfIn PDF document text
    • http://runoxujozu.rf.gd/korojovamibejinunenatala.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/22480787000.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/emotional_songs_bollywood.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_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 5664 bytes
SHA-256: 4d3ea264d0df6711bd283a86ef2b859e95af9d0a46a127f28b0432c81a637ccb
font_01_sfnt_off0000fca2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 10480 bytes
SHA-256: bce221e4c233462366483618629c18841d35e5805200e486347832784093ee91