Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19459ce345e0917…

MALICIOUS

PDF

77.0 KB Created: 2020-12-18 01:11:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 43f685c1806bf1ebe34f7bd14e56503e SHA-1: b008fbd04981d4ddda5eb74bf0c041c5a88d7498 SHA-256: c19459ce345e091747c3cfa3c9b169e8b2fc577fbb1b97cc1320d4432905d50f
104 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 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 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
  • 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://trafftec.ru/strik?utm_term=microsoft+arc+touch+mouse+driver+update PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5f9d01a97d1fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365599/normal_5f8cec2a45133.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381740/normal_5fcead527404f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381104/normal_5fa74b4dde1f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_5fab2787ec5cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378619/normal_5f927a84b7c3c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370778/normal_5fd8d3efaa030.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425256/normal_5fd047559b4ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415309/normal_5f9861bf6ee1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443372/normal_5fce2fa254572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380694/normal_5f8c5caa00fa2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf2de00f7af3919d292fa/1606218468806/34946378275.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1796fdf132613bbc1d0b8/t/5fc959b6a4964025cbcf3c23/1607031222852/movistar_team_bikes_for_sale.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19fdcbd14ff0dd2a1cd42/t/5fc67572f81c9a2a0c82cad6/1606841717991/philippine_stock_exchange_free_seminar.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB90 11940 bytes
SHA-256: 064a734fcae1df4d478b92842d4ebb71b95aa62599f4a13fc62891b3736e92e1
font_01_sfnt_off0000f064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF064 5428 bytes
SHA-256: 5c3dd8724de88af8377019a4d07b18edc9d961f7bdda5be1e105386b8d8a35ed
font_02_sfnt_off000102c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C8 10416 bytes
SHA-256: 49ef640d616dc9a0b9843e3c4b138768ce4398db9aa2e78a93a1514d9c8acdeb

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