Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a866cdad69f56c8…

MALICIOUS

PDF

76.2 KB Created: 2021-02-09 02:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: d96261c1fc7892884a37f273bacbf54f SHA-1: 5e3bb12c6b945a19732aaf2331cb04cea8f3dde5 SHA-256: 6a866cdad69f56c8de8dd4888aca455979f2f0609c03e7d04bc29a05baefdebb
136 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://druttle.ru/wb?keyword=free%20fractions%20worksheets%20year%202 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464077/normal_5fdac07b769c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_601089753a210.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/iijabgc/50703600259.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445864/normal_60048d1fa58f2.pdfIn PDF document text
    • https://cdn.sqhk.co/ketofebem/TK09giG/danmaku_unlimited_3.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/5djehgn/neloloxapotamirakugi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373520/normal_5fc8b3663b2f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459062/normal_5ffdb38d91141.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/eBUhUwG/prizefighters_ios_cheats.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426974/normal_5fe97e349ccd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416154/normal_5fc745995382d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417046/normal_5fe60cb224199.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/UGVi6rL/cko_kickboxing_king_of_prussia_schedule.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366347/normal_5fdbb8939794b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369183/normal_5fe25074be709.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/zatazewoz/kea_bwssb_answer_key_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/ye_baarish_song.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/autocad_dwg_reader_free.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_off0000ee93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE93 5284 bytes
SHA-256: 54dc4d8f1b60e5436073951d95d18d8eab60bf94892568395d255dec4b96c0e4
font_01_sfnt_off000100a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A8 10368 bytes
SHA-256: 5e51ba279424b6c2b29d40d3dab51e218d47048536fdb368f9a7be8adbf96441