Malicious PDF — malware analysis report

Static analysis result for SHA-256 b453dd24504711fd…

MALICIOUS

PDF

85.9 KB Created: 2021-03-04 08:14:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: feec67ccc79461c84002b9bdca880732 SHA-1: fea7774d3c9de925a0a324e7d022ae8cbc99dbce SHA-256: b453dd24504711fdf90e44ace618e06a0748fa89801af30ff42943d7b5014dd1
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://xezojetit.ru/wix?keyword=ranged+guide+rs3 PDF link annotation
    • http://nazulemijoxamif.iblogger.org/rational_functions_worksheet_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409098/normal_5ff54f805b798.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426260/normal_5ff6127be7395.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/power_90_workout_sheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472753/normal_5febc0c768ec0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444636/normal_5ffde3f31f7e2.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/bible_atlas_free_download.pdfIn PDF document text
    • http://bewepovuzif.iblogger.org/83268291117.pdfIn PDF document text
    • http://sowopezamiw.medianewsonline.com/difference_between_impressionism_and_expressionism_in_art.pdfIn PDF document text
    • https://pavofadibap.weebly.com/uploads/1/3/4/3/134370944/b44512e81b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_600e458dd0e9d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pusuzuxagog.rf.gd/office_holiday_party_invitation_templates_free.pdfIn PDF document text
    • http://ninunebuxidumeg.epizy.com/digital_photography_classes.pdfIn PDF document text
    • http://pewubep.rf.gd/72285857967.pdfIn PDF document text
    • http://resilasijajatil.myartsonline.com/38109669290.pdfIn PDF document text
    • http://tozurome.epizy.com/tuck_everlasting_questions.pdfIn PDF document text
    • http://muvasusug.epizy.com/negugavonutabodonijolok.pdfIn PDF document text
    • http://xezipunefosipu.epizy.com/hp_stream_11_pro_g4_ee_review.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_off0001153f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153F 5132 bytes
SHA-256: c028855f9df0efffa9525e2e556e97b866eea6a7d22a170b4c71dd9837b838fd
font_01_sfnt_off000126ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CA 10504 bytes
SHA-256: dc40c0016c80824cc96f1083bdcbb34e05f3da12f98e505d1313fb42cc60b902