Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c902bc76e01b16f…

MALICIOUS

PDF

71.2 KB Created: 2021-02-13 23:08:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 24cd66cfdb23f92ed2a989ff2f9a166b SHA-1: 3b2e96a6476198bc6b1e9724f1fd901ec61f4b7e SHA-256: 8c902bc76e01b16f61b888bbcd4962eb92b1e3884f314cdaabba927700097b76
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/wb?keyword=finding%20area%20of%20shapes%20worksheet In PDF document text
    • https://werobezukivipa.weebly.com/uploads/1/3/4/3/134337965/ef7024e945.pdfIn PDF document text
    • https://gamuzajebi.weebly.com/uploads/1/3/4/4/134481120/jakeje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388617/normal_5fe6fa54a3536.pdfIn PDF document text
    • https://cdn.sqhk.co/karopepagu/8dzecgd/11274091086.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374540/normal_5feb7e78983c0.pdfIn PDF document text
    • https://cdn.sqhk.co/xipepovivik/hipvHf5/infinitive_tense_spanish_conjugation.pdfIn PDF document text
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/7671735.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367304/normal_5fe81853786db.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/2572858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_601db33c2fe6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411481/normal_5ff21bde25881.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467032/normal_5ff5523516cbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461205/normal_600a18bcc4e1b.pdfIn PDF document text
    • http://xrootunited.com/beauty_plus_app_for_androidibvn1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408720/normal_5ff873a4e4cf8.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_off0000da75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA75 5384 bytes
SHA-256: d8a0ceffd5f4fea7d3c756a3f847a5f5320a713e576e91fd3d4fc596a3ed60fc
font_01_sfnt_off0000ecda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDA 10252 bytes
SHA-256: 3aafd6b6d119bd86f3b3dd1505e3500d9bb39f0c3008149ab83c7dc1bdcd2942

Open this report in the interactive analyzer, or submit your own file for analysis.