Malicious PDF — malware analysis report

Static analysis result for SHA-256 b703cc5260f71500…

MALICIOUS

PDF

74.7 KB Created: 2020-12-23 06:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7f1c2558972ff23abf4cb7b7b93740c5 SHA-1: 145bde046da70f0e19db90e14872ac13c365a227 SHA-256: b703cc5260f71500bc2b343640aaa0d0313d21c3b91643440c5127d073090ef1
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • 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.
  • 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://trafffi.ru/123?utm_term=24+wall+oven+home+depot PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444869/normal_5f9fb0fa31022.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f89ed397665c.pdfIn PDF document text
    • https://zetizisoxaw.weebly.com/uploads/1/3/4/4/134498522/4dad84767.pdfIn PDF document text
    • https://lexeponin.weebly.com/uploads/1/3/1/8/131856664/jonod.pdfIn PDF document text
    • https://sazagirisama.weebly.com/uploads/1/3/4/5/134585928/xapof_varip_givorun_nolabunigavo.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/gixirojozogufux/22nd_anniversary_poem.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/xurudu.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/zaxuw.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/core_questions_in_philosophy.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfcde490302e2a48c51263/t/5fdfe7065809ae34341fa05f/1608509190938/cablofil_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/83012168307.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/binomial_option_pricing.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/icloud_photo_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/84463456252.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 5200 bytes
SHA-256: fb6b0edc7fdbc1c360949a8ddc8749e0556bb303fb85ce99022b2680f729baad
font_01_sfnt_off0000f7dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DD 11324 bytes
SHA-256: 83a2d40c0085eb509346b9493f5b909275baa21dea1b71f94cefe6067600b335

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