Malicious PDF — malware analysis report

Static analysis result for SHA-256 00e2760d2b936d45…

MALICIOUS

PDF

67.0 KB Created: 2020-11-20 04:34:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ec2b966c0fffc26786632c5dbbd50fc2 SHA-1: af195ff952e998bd7e437b9532f9c098357d3f08 SHA-256: 00e2760d2b936d4506ba395518e25e115bdc755e3705cdc9c8e3d377f2df9b1b
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' suggest the document's primary purpose is to drive traffic to a network of linked sites, potentially for phishing or malware distribution.

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://trafficel.ru/123?utm_term=easy+acoustic+disney+songs PDF link annotation
    • https://kubamugikogili.weebly.com/uploads/1/3/4/5/134508843/367406.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_5fb3c3aaa7a4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375355/normal_5fa1780ada5a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fa20e6dedf04.pdfIn PDF document text
    • https://nodemexawek.weebly.com/uploads/1/3/4/3/134331915/4712716.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450047/normal_5fa8509addfef.pdfIn PDF document text
    • https://detopeda.weebly.com/uploads/1/3/4/3/134305225/9815343.pdfIn PDF document text
    • https://xisiwazebisa.weebly.com/uploads/1/3/4/7/134758569/7868439.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421051/normal_5fa296516077a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470839/normal_5fab9e65cd771.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/58b5c19e-e4ef-46c4-9290-507b208ee6ad/sijowidup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92710d5c-b060-4b39-9258-b2fe7639873a/karisufosuwenorusamalen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/469fd64b-087f-412a-9ebb-be71e46769c1/on_the_road_jack_kerouac_themes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31e71028-ee2c-4ae8-aa95-88bd196aa77b/dekufebexevanuzusimatax.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_off0000cb96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB96 5040 bytes
SHA-256: 8b54e3fb180bc01cabf2dbe12e0f127110c08335ec159112dca24ab684b80bfb
font_01_sfnt_off0000dcda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCDA 10180 bytes
SHA-256: 36cec598c506befc20f8fd01e21d19e00a0f760258416eea7f850b60db894fd1

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