Malicious PDF — malware analysis report

Static analysis result for SHA-256 f493903c00d28f22…

MALICIOUS

PDF

64.5 KB Created: 2021-01-02 04:20:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b80a4ae2990ec7c4907ad088a15b7fc1 SHA-1: eb72c019fb260232292026c31b3258f97e310403 SHA-256: f493903c00d28f22c590d19362182533b29aeefc19985f614567d123e4cd6f5f
214 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to known malicious redirectors or link farms. The document body, though heavily obfuscated, appears to be related to search engine optimization for PDF documents. The presence of a malicious redirector link and the ML classifier's high confidence score indicate a phishing or malicious content distribution attempt.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?utm_term=2007+toyota+tundra+repair+manual+pdf In PDF document text
    • https://vebamumu.weebly.com/uploads/1/3/4/7/134730259/6a720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387586/normal_5fbf0753a7eac.pdfIn PDF document text
    • https://kawigijutugin.weebly.com/uploads/1/3/4/3/134351661/8953747.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fefc716ce827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370304/normal_5fda6e8c9dbc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412890/normal_5f9bd19648c5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477181/normal_5fc9521604f77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452217/normal_5fa1ce4d32445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f8703dfe2e8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5fa8ab358a3e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_5fa0d108c456c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423452/normal_5fc95d150b239.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/75be234d-5767-4fde-8daf-f7895d80fd11/age_wonders_3_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3850d59b-76d7-44b7-89b0-864c50befeca/mewizajivuwevularamizaxix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4583030-269b-4c7a-8006-4f77230e3151/latent_heat_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08177f00-89e6-4ea0-9a43-822c06b6072b/our_origins_5th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b59fc24-bd96-4fae-8394-c367e33d1a25/wandering_son_mangadex.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_off0000c1b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1B7 5372 bytes
SHA-256: 5a9ebed74ad40be3d260831c36521286241302708bf8b8c8a9af2064d4fd0343
font_01_sfnt_off0000d3f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F7 9688 bytes
SHA-256: e37649e53c993fc277c16f7af0d0e49c01a8e49078c560d36e8ab99066121485

Open this report in the interactive analyzer, or submit your own file for analysis.