Malicious PDF — malware analysis report

Static analysis result for SHA-256 652ee0ba3fd88dd2…

MALICIOUS

PDF

68.8 KB Created: 2020-12-19 01:00:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c8ab5b1007314f4ad243c31b7c0b96ac SHA-1: bb6e88a03bcb6b295233fdaa39367b6d6af4d456 SHA-256: 652ee0ba3fd88dd2921305b90e51446fbde27ee1cc7710ecc8cef740e569cefc
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable hosting services and are used in link farm configurations, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://trafffe.ru/123?utm_term=black+and+decker+rice+cooker+steamer+manual PDF link annotation
    • https://juwatupajevofa.weebly.com/uploads/1/3/4/7/134705275/mupitox.pdfIn PDF document text
    • https://jutawalafomas.weebly.com/uploads/1/3/4/3/134316275/tukux.pdfIn PDF document text
    • https://jafakatulo.weebly.com/uploads/1/3/4/3/134353771/kiwepukikupalipoj.pdfIn PDF document text
    • https://jokineviraxara.weebly.com/uploads/1/3/4/2/134265776/bupukatos.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/6354532.pdfIn PDF document text
    • https://waleberof.weebly.com/uploads/1/3/4/3/134385841/3de78573bff0f.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/0de58f12-f535-4b47-9e12-4e67b467e1e2/fepibibivixazebijiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/937f4108-395e-4067-b789-78df915821d5/figumevoxipolosijosovam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d0d3a3bf4b14abc221fa/t/5fcf6ed576f3eb1a46e4212f/1607429846461/rise_of_kingdoms_best_civilizations_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35930d0e-b1e8-4adf-951e-69c7f4ee9cf2/gta_sa_lite_download_apk_and_data_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/zeridamoputik.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10dd611f6a419848684c6/t/5fc171defa04221c71565151/1606513118658/47487878035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e370d37-4949-4401-91bc-472e388c1b99/xuwot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/451df634-81b1-44cd-8da3-a5686f7e1bb2/43039702149.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A9 5200 bytes
SHA-256: b46f2084ee55d31431df0664629e8c1bf004e7be6b08903628d5c0ebf51c25d0
font_01_sfnt_off0000e240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE240 10552 bytes
SHA-256: 1db74a16f5902f64e49fb38cbb8c49ccb19ad1d12a6534b6b205efb507826b99

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