Malicious PDF — malware analysis report

Static analysis result for SHA-256 63da310fc85f4f4b…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 05:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 38f21316b0f467808d719356a238112f SHA-1: 70d1af294da659df03cd7152add56375ee0f5710 SHA-256: 63da310fc85f4f4b2868ab9fd04f5666ab1a8d45665ab473f1d48eade8c4ad53
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://crophysi.ru/wb?keyword=if%20a%20guy%20disappears%20and%20comes%20back In PDF document text
    • https://cdn.sqhk.co/vemegunir/8gjW2gf/sofia_battle_arena_toshinden_gif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477878/normal_60194dbb6b3da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413835/normal_60145a3684b01.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/JUQFhfz/3441378072.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371509/normal_6025eb88224b4.pdfIn PDF document text
    • http://fullcreditreport.info/cute_child_status_videos5uz7.pdfIn PDF document text
    • https://cdn.sqhk.co/sativomofij/bdicggX/word_family_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419630/normal_5ff78efbcb3e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417659/normal_600d6f0225506.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486772/normal_602f3fd22e329.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416493/normal_6031d103a6998.pdfIn PDF document text
    • https://cdn.sqhk.co/wesebewoweva/heK6gdH/playhouse_nyc_club.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414677/normal_6010eea353143.pdfIn PDF document text
    • http://lovelid.xyz/ximuxepokuleruxo8ra44.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403814/normal_5fcd28e1e291a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD975 5688 bytes
SHA-256: 3adf5daebc282489598e1ae5bfa5bfc14ca21156d0a82a8fe827aa110f6af57e
font_01_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 10136 bytes
SHA-256: e838c8c19c28d67339b6f2c492bbad0c1771d6500ee10a86fe4994a2a609b2e1