Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9fb3c04fac68b2d…

MALICIOUS

PDF

66.0 KB Created: 2020-11-11 19:36:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d9150db8589726b2281c888bc7c59367 SHA-1: ce6b41435148b5aa1d0a5e958b708a2775f0ded4 SHA-256: a9fb3c04fac68b2dc5406e2760abdc4a57ea915083d3cbce0837659b373d6346
164 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a 'PDF_SEO_LINK_FARM', suggesting an attempt to direct users to malicious content or phishing sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically classifying it as 'Pdf.Phishing.Trojan'. The embedded URL 'https://traffnew.ru/123?utm_term=toy+story+3+yahtzee+jr+rules' is likely part of this malicious distribution or phishing scheme.

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
  • 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://traffnew.ru/123?utm_term=toy+story+3+yahtzee+jr+rules PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443602/normal_5fa50e8115135.pdfIn PDF document text
    • https://lefedatit.weebly.com/uploads/1/3/0/7/130776734/lejif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471109/normal_5fa40709d7728.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f88d71494d58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_5fa8167f6ecd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_5fa243a8da4ad.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/538428d3-3d57-4fbc-8245-46882ab46dce/89799482096.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd74dfe-e002-433f-871e-df4ccf6066f2/wasipaxosot.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/international_creative_management_submissions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16822548-ce20-462d-9938-adf782102701/overnight_sensation_mtm.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/sunibiseriwomogiveb.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/heart_disease_causes_prevention_and_treatment.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/cms_calendar_2019-_20.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCA 5112 bytes
SHA-256: 1d736472ad7dfbf566972d1bfa4795f8217d731135a36f4dc422b79177567661
font_01_sfnt_off0000c13d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC13D 10224 bytes
SHA-256: b1b9a4200f329b7d7721003411b05e0cea9cde030a4a99011a52feed49b3ba81
font_02_sfnt_off0000e48d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48D 16100 bytes
SHA-256: 1b4b27cd429d9800ce6de6bc8be2d1c6382da676ed598ddfeffce0e3d1a2ff1c

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