Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d7feed963536b03…

MALICIOUS

PDF

74.4 KB Created: 2021-04-07 07:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 65bf5e83d3a8480385cc34a222a87691 SHA-1: 56fac9be69d0e14e9eeeb0cb3c518d218b43ced6 SHA-256: 5d7feed963536b038d089f09c2d11d14725d90b37b1a46cebdf6e2bcb1687023
184 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=hp%20deskjet%202542%20connect%20to%20wifi%20mac In PDF document text
    • http://proita.fun/wevupasiwuwadia159u.pdfIn PDF document text
    • http://moresukko.ru/blank_face_download_zipp79rb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452609/normal_603a88c7df74d.pdfIn PDF document text
    • http://mscredit.info/61036405640akaz5.pdfIn PDF document text
    • http://smartradiobf.ru/how_to_turn_on_cobra_microtalk_walkie_talkieszr2d.pdfIn PDF document text
    • http://alkim.xyz/economics_hubbard_6th_editionu3arb.pdfIn PDF document text
    • http://vsspb.ru/1699897163864gxp.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_60370fc167205.pdfIn PDF document text
    • http://mnogolidov.xyz/93945850088owv7i.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465545/normal_5fe196a2c4b56.pdfIn PDF document text
    • http://sparzha.club/zujaripigunakelisintsq0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420013/normal_60098863abd36.pdfIn PDF document text
    • http://dreamingdeveloper.com/monster_by_walter_dean_myers_free_dotpx49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410703/normal_603191c14c247.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459941/normal_602c9a3a6d3f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418755/normal_5fd82ae52f8e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3a988cde-8684-4da7-9cc5-a1c078ef4475.filesusr.com/ugd/1f7474_3406acebde804db2a05e956ffa76a0a3.pdf?index=trueIn PDF document text
    • https://234a0c07-d908-4261-bb83-16b3c96a9b04.filesusr.com/ugd/73e0e6_7b0fefaa8ccc440b9d3466ff1d7fb116.pdf?index=trueIn 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_off0000e431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 5708 bytes
SHA-256: 91dc4092bb39c8908734a3ecc6ab9bfebe43b9ee2e7b9a186352892e97173506
font_01_sfnt_off0000f7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C0 10796 bytes
SHA-256: 01f0f186af233c3eb9789d38b819ea7ceebbafb1649945bf83af735bb0a3acaf

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