Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d085cd3030557e9…

MALICIOUS

PDF

70.3 KB Created: 2020-11-30 18:18:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 6009fd8986e8c9d6acd277da2cba6a98 SHA-1: bc127eb9f26c217bfc8401e4bcf8e551d6950cb3 SHA-256: 9d085cd3030557e99fe8c658e16b8bab51eac49d7e130676246cb23c7b01c9ca
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to Weebly and other hosting services, indicative of a link farm or phishing campaign. 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 numerous external URLs suggest it's designed to redirect users to malicious 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 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/aws?utm_term=mac+operating+system+user+guide+pdf PDF link annotation
    • https://beluloxepivizor.weebly.com/uploads/1/3/4/1/134131295/6517479.pdfIn PDF document text
    • https://jizenifujepuv.weebly.com/uploads/1/3/4/4/134489688/wawuvaja.pdfIn PDF document text
    • https://pojosividadom.weebly.com/uploads/1/3/4/5/134524524/5868874.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376866/normal_5f997873b41c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479705/normal_5fab610d26a74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404116/normal_5f945a59108b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368485/normal_5f8db534e0543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411511/normal_5f9dc01c347be.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/b6074ad1-ba46-46ea-9108-7a50efe746d9/light_o_rama_16_channel_sequence_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc380a327a199023ac5df36/t/5fc47841eaf37e3b642bac82/1606711371355/worksheetcloud_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c694be70-97aa-4322-8fb5-7cc008ca9cc7/como_manejar_un_carro_manual_en_subida.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_off0000d23c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23C 5552 bytes
SHA-256: 4da4897bc9c5a5be8943259e2c4c08e8672ceb5eb3207facff15d2f5bdca6320
font_01_sfnt_off0000e51d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE51D 11116 bytes
SHA-256: 62541cd4b9a5f6c34126a98d883c891444e1ea07a6cae6f5c2fe18efca482a1a

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