Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd8b557410536945…

MALICIOUS

PDF

75.1 KB Created: 2021-02-12 07:27:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4ef2a2185967ef8a0b739c548229af93 SHA-1: ab74008a09fd9fd4102555c61d5b68c92d404307 SHA-256: dd8b557410536945536c5902373b547f2e725c449f2066cb1321d8fe878904fa
202 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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/wix?keyword=warhammer+40k+only+war+hammer+of+the+emperor+pdf In PDF document text
    • http://indital.space/nusagojij8vyp0.pdfIn PDF document text
    • http://navalny.design/download_wheelie_challenge_mod_apk_android_1y8pya.pdfIn PDF document text
    • http://bred-enligne.com/kuyucakl_yusuf_indirlnno8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448536/normal_5fce872999e90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481061/normal_5fec18d3218d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425726/normal_600882747390c.pdfIn PDF document text
    • http://tusuvopub.22web.org/41307991348.pdfIn PDF document text
    • http://figixifokemamu.22web.org/90296464592.pdfIn PDF document text
    • http://prizinsta.online/fuxojifepenaku4q493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408324/normal_5ff6366da3037.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_5fefd46f93fbc.pdfIn PDF document text
    • http://wonder-ita.space/majagofibavukimimalygrwt.pdfIn PDF document text
    • http://rodopigigixodak.iblogger.org/jikovikanubikorofugig.pdfIn PDF document text
    • http://getporte.xyz/home_maintenance_checklist_excel_templateqger6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369784/normal_5fcc4618502fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lutidufewujasa.epizy.com/zejulonoweneravutexe.pdfIn PDF document text
    • http://zetafilutebes.rf.gd/salagi.pdfIn PDF document text
    • https://s3.amazonaws.com/feseni/adjective_worksheet_for_class_3_with_answers.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_off0000e90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90C 5604 bytes
SHA-256: e86ea228b1e533bf3d56e096ddd6b1b9286f156f498a2339c71320565f1cb743
font_01_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 10272 bytes
SHA-256: be406d6bf6fc3899cdd7e59e1c6b6fb218aa37dd924f70559bde6ae5d3dc4b50