Malicious PDF — malware analysis report

Static analysis result for SHA-256 00faf594d22ca292…

MALICIOUS

PDF

84.4 KB Created: 2020-11-29 07:42:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a73b2c2adad7ba3a68879e4414131443 SHA-1: 95dd1b9e744b4b40cd258f709a195948c27ab94f SHA-256: 00faf594d22ca2921b34228714be1e5bfc387c03775ae77eff0911bfb407573a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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://trafftec.ru/123?utm_term=definiciones+de+enfermedades PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460233/normal_5fc2d64c7721f.pdfIn PDF document text
    • https://xemuvexakono.weebly.com/uploads/1/3/4/6/134655393/zewejubawanip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421614/normal_5fc2c4afe90fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f8ea038ebaa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_5fc20ca096e57.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/998a88fa-b8de-4928-a7f2-c6306081b399/81758176184.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4e5683f-719b-438a-9bd2-835127c30ebb/zeteteruwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3732a44f-edd7-4650-b169-e213047eebcd/58307880278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdbf7758-8b54-4ac4-bea3-198cf8d58c6b/xokiwezilow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dae38f85-c74a-47f4-a266-c5608cd33090/download_textfree_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/toluf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3bbf1cb-3df8-4d05-b908-f42d58243aac/13587921255.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/us_navy_style_guide_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd611d2-ee97-4fd7-913f-464d37794880/gokav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d10991b-0e4b-4143-ba55-28216412eb32/votobawi.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_off00010b32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B32 5132 bytes
SHA-256: 2b362062e9727534cd236f59adc3f8a081878ec9bbeba3ddf71e3667f34e13c5
font_01_sfnt_off00011c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C96 11888 bytes
SHA-256: 9cf2ff865d570f2c8d33236f9e6a042bc8e06d9490493f3935c5d2d2a7f35007

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