Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ccf73daecdd4be7…

MALICIOUS

PDF

70.9 KB Created: 2021-02-18 19:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4d9db29aa38c515ec2966a42e3ce7044 SHA-1: 455a182d12b6436f4e9eb239b1bd52ad949f9e2c SHA-256: 0ccf73daecdd4be7817ad4ea93be12c05b6fab7dffd03c63189b3d8cea0e1f13
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wix?keyword=legendary+game+of+heroes+hack+no+survey In PDF document text
    • https://fusufuxono.weebly.com/uploads/1/3/1/6/131606103/jilijovajesudu.pdfIn PDF document text
    • https://cdn.sqhk.co/fewibefanid/gejflic/81169031447.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuvajebodu/jNBA3yT/kugagovojevikoninokeda.pdfIn PDF document text
    • https://josojizaxa.weebly.com/uploads/1/3/5/9/135966587/debbd7dc2.pdfIn PDF document text
    • https://fosaxobe.weebly.com/uploads/1/3/4/8/134882536/9873994.pdfIn PDF document text
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/2282bbac4ffd9.pdfIn PDF document text
    • http://glossywp.online/kuxusemotasamaxagifpjxb.pdfIn PDF document text
    • http://nukels.xyz/81717043580m2hls.pdfIn PDF document text
    • http://afracheat3.xyz/sobijesepaxexizvt197.pdfIn PDF document text
    • https://cdn.sqhk.co/jiluputumusi/eVihjeB/89959573552.pdfIn PDF document text
    • http://ijmalan.xyz/aiou_admission_form_2019_freehld80.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/TMtiehb/cartoon_wallpapers_cute.pdfIn PDF document text
    • https://guvopizap.weebly.com/uploads/1/3/0/7/130776702/942550.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/gotitibekovi/acecqa_responsible_person_fact_sheet.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_off0000d8ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AE 5572 bytes
SHA-256: eafd5380fa56d78145c174308c74e1c3f53150089780e6ad0caa777320f1f007
font_01_sfnt_off0000eb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB91 10408 bytes
SHA-256: 755f0a2a25832c99162ad4651f67361de52bf12d6b842a0b45ce207b2bb9831b