Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4da8d83f8c8098…

MALICIOUS

PDF

65.0 KB Created: 2020-11-13 16:35:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 6ae66253e8e71d2391a578d355d14d74 SHA-1: 7c3f57531670a9459f0a7fbb3cae04b8e18dc11f SHA-256: dd4da8d83f8c809877e1579e8ad3df7de5f0645bebffbabc2d24be23eb70d8fd
156 Risk Score

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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/123?utm_term=christ+the+king+church+baton+rouge+mass+times PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470553/normal_5fa7669e9f3e6.pdfIn PDF document text
    • https://votixired.weebly.com/uploads/1/3/4/6/134633812/jezager-gexekawenud-biwoj-wanadufig.pdfIn PDF document text
    • https://gadigode.weebly.com/uploads/1/3/2/6/132680949/3519853.pdfIn PDF document text
    • https://karezolakep.weebly.com/uploads/1/3/1/3/131398125/patokoja.pdfIn PDF document text
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/kiraxesejo-bopemix-motelosawekij-movaw.pdfIn PDF document text
    • https://diwefiramogepot.weebly.com/uploads/1/3/4/2/134265367/c144f4642d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/jackie_lawson_ecards_log_in.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/characteristic_polynomial_of_matrix.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/75555481169.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/gecko_heat_press_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/pelopivunef.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/lezoda.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_off0000bf66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF66 5292 bytes
SHA-256: 6acecebac2e9c9b67190794dc9b88916d08789e3970d14630cc5e1db11a6393c
font_01_sfnt_off0000d13b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD13B 10596 bytes
SHA-256: f3a0a2899aaec818f2d3ca71433baf82e976e0a6d967b210d9233d7210dbf2ba