Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b1538f3b3ea33b9…

MALICIOUS

PDF

72.4 KB Created: 2021-02-03 13:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b78ec81ff0907b04cae9bde68ff6aadc SHA-1: 560085293425fba6608bd162a4382ffcb7df6c72 SHA-256: 3b1538f3b3ea33b95e37d9be2fe3e4f45073bad1ab01e83fc77aee8e54b54143
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wb?keyword=hungry%20dragon%20mod%20apk%20new%20version In PDF document text
    • https://static.s123-cdn-static.com/uploads/4504554/normal_5fef3502776aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_5fdb91d24366c.pdfIn PDF document text
    • http://tifeguga.22web.org/campbell_biology_9th_edition_ebook_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446270/normal_5ff885880dfdd.pdfIn PDF document text
    • http://degujub.iblogger.org/somutuwanoradiwefenaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485826/normal_5fd0b7e1d43f7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369522/normal_5feb7857cd255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_6010b72f36f44.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jubadoloje.epizy.com/hennessey_venom_f5_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/chaar_sahibzaade_2_movie_filmywap.pdfIn PDF document text
    • https://s3.amazonaws.com/gupawupigawono/cartoon_wallpaper_for_mobile_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/kujalawabomasag.pdfIn PDF document text
    • http://gokixedotoj.epizy.com/ramotafutuxomi.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/likuvetupetegamalitoxes.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/sotomajexopoketurexuli.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_off0000ddaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAF 5524 bytes
SHA-256: a9007ac098878a40b7d8606b956968e40cd5d449b2ef11e78f766995e8fc44b9
font_01_sfnt_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 10536 bytes
SHA-256: cb9e9ff0be67bb8b4cdcfb84862c82000554dc2d24ef92db45426ea4ef410dae