Malicious PDF — malware analysis report

Static analysis result for SHA-256 888d183eced4269c…

MALICIOUS

PDF

90.3 KB Created: 2020-12-03 14:22:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c77c3da064b2398779d5c654c296605d SHA-1: d8b2b172ba8f24b2b8f894c9d55e7914e6330b1a SHA-256: 888d183eced4269cf6e2a884769b1137c04786b45c640ca733a27055c52357f0
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/strik?utm_term=realidades+1+capitulo+1b+answers+page+27 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367313/normal_5f8f71c6118ca.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393034/normal_5f9d2ea49b0d2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379038/normal_5f909137a950d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366961/normal_5f965cadb1a6b.pdfIn PDF document text
    • https://vixananuxa.weebly.com/uploads/1/3/4/8/134881407/serotudipasitiwijibu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464527/normal_5fc859a83470a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457332/normal_5fa43983297d0.pdfIn PDF document text
    • https://mosunenipotope.weebly.com/uploads/1/3/4/7/134767451/pubowuvepim-setiruxoze-saloril.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/683bc568-95b1-4815-84bb-5dc55fd158d2/haverhill_line_mbta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76edfc08-1ebc-4841-954f-0bff63cafc47/gelakuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7154a493-d10d-49b7-a491-85dfc962f837/neluvefona.pdfIn PDF document text
    • https://s3.amazonaws.com/juvosi/graphing_quadratics_in_standard_form_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57275c4c-878a-473a-afc9-1c1ab651268d/tivopiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf98d56-4390-492f-baf0-3932ce6d3ad5/physics_2_study_guide.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10849 5744 bytes
SHA-256: b5ee1639a972aa1bfdaf35992ac01b99909fa14a9ce4e005604e286b6ca7ba58
font_01_sfnt_off00011c05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C05 12504 bytes
SHA-256: 72ff4034e37be811b5848dd00ce5f6271f51137a0c2c6bf54aa213fcbe52f9ca
font_02_sfnt_off00014519.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14519 16076 bytes
SHA-256: 8e080451972fa98aa9e3536045215e62b9f74f9d761fc20c19baab760c38cae8

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