Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3909c52552852af…

MALICIOUS

PDF

68.6 KB Created: 2021-02-17 15:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d82d5533eae1bcb92009eeac2a504dd2 SHA-1: 08a12e39a890989847b9c5265bdda2327ec344a1 SHA-256: b3909c52552852af8afa23dd6d727ff06f4e4618b1a1e4e92152c6fde60e2290
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=bounty%20hunter%20junior%20metal%20detector%20instructions In PDF document text
    • https://cdn.sqhk.co/wezokobuli/dhghjjg/sawetuzafakewi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392199/normal_6003cdc73ad70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412174/normal_6022a0b9e247a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459641/normal_6010c6378d409.pdfIn PDF document text
    • http://vujukotigenali.22web.org/pubawegituzonusufex.pdfIn PDF document text
    • https://cdn.sqhk.co/sevafeluba/jftrji8/xadiva.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418764/normal_5fcb1b276bacd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470028/normal_6006bc2596231.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_5fd680e2d1a21.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470681/normal_5ffeafc92c39d.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/ouiYibW/white_emulator_and_tips.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/r5gghaS/blockchain_wallet_bitcoin_cash.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483103/normal_601e7bb652928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391925/normal_602460852c108.pdfIn PDF document text
    • http://meetchat.space/city_ward_mapbc398.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lokuvutifinulef.rf.gd/canadian_visitor_visa_form_imm_5257.pdfIn PDF document text
    • http://zavinawotomuvef.epizy.com/pazadovevivuzajada.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/antithetical_verb_form.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_off0000cdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB4 5408 bytes
SHA-256: 9c061f14916a882c9242e9ca8f04149c3b959a0d279dab411c27b9770c424cd2
font_01_sfnt_off0000dfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFEF 10876 bytes
SHA-256: c2f9c725af41a775c9c2fe638be112f609026907e7d5a8b70840e177f8c1cdc6