Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1ebf53686efeef…

MALICIOUS

PDF

85.2 KB Created: 2021-01-01 13:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1e1ce3ca6d7ccf1b02b80e9c96dd7edb SHA-1: 655bba63686ec35d9a60947c00a5f5a519403f9a SHA-256: 0d1ebf53686efeefe39f4a81d0e0bf6281b79aae7100693f1a6778ac68627a87
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with one prominent URL pointing to a phishing lure related to 'easy voice recorder app download'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure suggests a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffset.ru/strik?utm_term=easy+voice+recorder+app+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451930/normal_5fb760dc8d683.pdfIn PDF document text
    • https://gotumofavi.weebly.com/uploads/1/3/4/6/134602885/dalome_kazikawobabul_sunogupove.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/d860c86cc39a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_5fe7688566fc4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_5fb6d92c844e0.pdfIn PDF document text
    • https://cdn.sqhk.co/jakabapewuv/E9iaQmf/6313442873.pdfIn PDF document text
    • https://fejagirizow.weebly.com/uploads/1/3/4/5/134525681/e6c89bf6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366655/normal_5f89217f1baec.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/bDjdaYw/75622442239.pdfIn PDF document text
    • https://kusebedanosude.weebly.com/uploads/1/3/1/1/131163667/piraboka-botazabubinug-zamawek-medowapapuse.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/a591fae5-4f77-414a-ace6-134c0621c9e3/ejemplos_de_investigaciones_cuantitativas_en_salud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c15b7260-72a0-4b50-baf1-769d8c995d2a/pinib.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF012 5280 bytes
SHA-256: 6e91d3b1e0e28236eae43cba39f5388fe4799cec77ad053cbc4a863f1078be75
font_01_sfnt_off0001022c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022C 1888 bytes
SHA-256: ac14972b7b2947834c866a693307dd83921f9e40fad0e2ab592cecd13463aa54
font_02_sfnt_off00010b3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3F 11420 bytes
SHA-256: fa5c50fb674e96a0cd5f02e3e257cfed4d876180dec2412bf52617192be04134
font_03_sfnt_off0001325e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1325E 16092 bytes
SHA-256: 39b2f4b99ee08965fd4836f89f628a00cde8346cb181131bba0308e80db8fb67

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