Malicious PDF — malware analysis report

Static analysis result for SHA-256 995c90295401a703…

MALICIOUS

PDF

65.1 KB Created: 2021-02-11 15:38:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bbac484a2a52b8dcd5be586c04741ea0 SHA-1: 6b70f6edfbacea4bec148d8a1731c4711a2482b4 SHA-256: 995c90295401a703426eea76435cd7e84f58f40484a88522bf65c12b88c5cbef
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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=idle+miner+mod+apk+5play.ru In PDF document text
    • https://cdn-cms.f-static.net/uploads/4530429/normal_5fd0dd363c67b.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/language_development_an_introduction_9th_edition_ebookgr4zf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450151/normal_6013c19821fa7.pdfIn PDF document text
    • https://lipuxavevafip.weebly.com/uploads/1/3/1/3/131398459/10a00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411246/normal_600c46f39e1dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443803/normal_6010902482ff6.pdfIn PDF document text
    • http://1xbet-football.fun/1965_mustang_manualzj4qv.pdfIn PDF document text
    • http://megantv.site/7447494461vfp6a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wekujugom.epizy.com/jamoluxazo.pdfIn PDF document text
    • http://werolalijatet.rf.gd/56827213297.pdfIn PDF document text
    • https://s3.amazonaws.com/leributafa/41190829487.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/ap_calculus_ab_review_packet.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/kalinga_university_original_marksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/binkw32._dll_zip.pdfIn PDF document text
    • http://dirojuriju.epizy.com/unpunctuated_paragraph_with_answers.pdfIn PDF document text
    • http://babefuv.epizy.com/avery_label_5260_free_template.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_off0000c6fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FD 5188 bytes
SHA-256: 1549ba3d8109757f8d166ddf86b0afbd9bb742ee34034b89445859825f02b1cd
font_01_sfnt_off0000d899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD899 9228 bytes
SHA-256: 6b16a95ec039158d55c23202aa07429fa61da45d89f5fc2d8688c0b837b0fe98