Malicious PDF — malware analysis report

Static analysis result for SHA-256 456a6d9d73d197ae…

MALICIOUS

PDF

72.4 KB Created: 2020-11-12 23:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: ac44742894a5eaba3716c5fd15c3e17e SHA-1: fc77c11b1b86a1a67430a373a127b1208e1a2499 SHA-256: 456a6d9d73d197aec2faba474a690d34283948834f669550480ddd8d538596e2
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ggtraff.ru/123?utm_term=simpsons+myers+briggs+istj In PDF document text
    • https://tabuxeniki.weebly.com/uploads/1/3/2/6/132682737/vekoxotawib.pdfIn PDF document text
    • https://megadezatesaram.weebly.com/uploads/1/3/0/7/130776649/fukakix_lobonagoke_voxajutafetufos_xujimozoxivid.pdfIn PDF document text
    • https://vozunutav.weebly.com/uploads/1/3/0/9/130969695/35812.pdfIn PDF document text
    • https://zewubonorow.weebly.com/uploads/1/3/1/3/131398185/9390877b.pdfIn PDF document text
    • https://gugewixurot.weebly.com/uploads/1/3/4/3/134393699/831b61.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pezofut/bawofon.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/leapfrog_computer_game.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/larch_mountain_hike_loop.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/sufovuxunovituxelawisutuv.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/41584266380.pdfIn PDF document text
    • https://s3.amazonaws.com/takeju/2691838053.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/51976630137.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A3 5108 bytes
SHA-256: 50c48648ccd957977f240b0873071f50c5b51e07fd6b10441ecafbe22ae504f0
font_01_sfnt_off0000e3e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E3 10332 bytes
SHA-256: 4008b9cdbf44d472c34c4d00aad0a3aa5b9ae20435d6c141d7996450ba7b04cd
font_02_sfnt_off00010734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10734 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3