Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcec668e5d0628df…

MALICIOUS

PDF

72.1 KB Created: 2020-11-22 20:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b55cd7d1fe138b63cd046cdf55604ba1 SHA-1: 7d17c233103c19959dc3d2a13ef5756c5f63a954 SHA-256: bcec668e5d0628dff403333edce6d5cdd8429a29091728e71118581572a104b4
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://cctraff.ru/123?utm_term=do+while+javascript+mdn In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387035/normal_5f8fbe418d5a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422622/normal_5f96f5a036d4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467274/normal_5fa6b2057acf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f9604fd7d9f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/gobejusujafibiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348d2826-e557-455f-87c5-5c620a9dd0af/lenegodefasabejupegek.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/kingdom_hearts_opening_song.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/shakespeare_sonnet_147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1f7cdc7-d871-45b9-a5fd-ab3e97451610/gw2_elite_specializations.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/339f2bc7-edb2-41e5-a576-c12bab003fab/38150126418.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeccaac3-cce3-4153-a67c-6a875597e008/korelasyon_analizi_nasl_yaplr_spss.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49a58144-1acf-4ec3-a067-291ad1fad084/brassage_intrachromosomique_2n3D_4.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_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 5540 bytes
SHA-256: a5dc199e64cb31a5420894acad6f046a3b32f5c070939206d7be05f808241b93
font_01_sfnt_off0000eda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA4 11336 bytes
SHA-256: 0c5ee6df9ae5ad17c3098caf2c948e571dc364176e56d2ff893c119babd2f9ca