Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee1854dabfdf288f…

MALICIOUS

PDF

72.3 KB Created: 2021-02-19 19:21:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3b3de325c475f30b95b0ac229eabacc6 SHA-1: c95b4bdd5ef60db0a72a132db9a1dc03a8bc0a24 SHA-256: ee1854dabfdf288f79ffb92702710008cfd6ba3269b4490c1f4fc17be86abe69
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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=amazon+gift+card+redeem+code+generator In PDF document text
    • https://cdn-cms.f-static.net/uploads/4414679/normal_601afcb701afd.pdfIn PDF document text
    • http://tgesheff.xyz/neoucom_medical_school_admissionscn7cm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5fce920e451d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_6011f84aba34f.pdfIn PDF document text
    • http://vezerfa.xyz/solidworks_cswp_preparationdbv38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369514/normal_5fd98d51de355.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476122/normal_601d2f05de450.pdfIn PDF document text
    • http://greyfruit.space/tiny_town_miniature_golf_estes_park9awuz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408333/normal_601973813ddc7.pdfIn PDF document text
    • http://xbet1.fun/268623638620f6i.pdfIn PDF document text
    • https://lowujowe.weebly.com/uploads/1/3/5/3/135320741/5259422.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/gusule/photoshop_background_frames_psd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/microevolution_vs_macroevolution_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/formation_france_alzheimer_paris.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_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 5172 bytes
SHA-256: 3cd92c6cfda0780770b2724920816884ec6b533e3f1413bd78e0d2de062c75a7
font_01_sfnt_off0000f05f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF05F 10476 bytes
SHA-256: bd529e13c1a1e8d9988a9d1b83685214849d076dea0e48dd76a4edc75fb22277

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