Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd2ed720b48714b…

MALICIOUS

PDF

67.8 KB Created: 2020-11-17 17:19:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: dac590f2ef26998643fe115a9167d3b4 SHA-1: d7e7aa18f29a43b1573a871c5439f4e0fc7fe6d4 SHA-256: 1bd2ed720b48714bc559e0e60ac33f2f3e1b136917513f2e229e06b88b41534b
214 Risk Score

Malware Insights

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

The PDF contains multiple links to external websites, with at least one identified as a malicious redirector. The heuristic firings indicate the PDF is designed to link to a large number of external resources, likely for SEO manipulation or to distribute further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing or trojan PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://ggtraff.ru/123?utm_term=knights+and+dragons+hack+tool In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413705/normal_5f9c7e8656123.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389358/normal_5f925dd73ceeb.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/bojaseweku-dawanili-demaronesapoja-defokutuzigezo.pdfIn PDF document text
    • https://xotugakifegug.weebly.com/uploads/1/3/4/1/134131530/0b8d7.pdfIn PDF document text
    • https://pumutetigowon.weebly.com/uploads/1/3/4/6/134699291/jujonixagisinimorod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f8bcff66d60e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383314/normal_5f8bdb6bbc293.pdfIn PDF document text
    • https://dubasatipin.weebly.com/uploads/1/3/4/4/134459773/davozunimomagux-maxulino-vokoxevakalugu.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/kudefem/worcester_county_north_deeds.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/2412657077.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/sono_io_amleto_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/algebra_1_regents_june_2017_answers.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_off0000cb3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB3F 5232 bytes
SHA-256: 39351aa984ec7cf117e8580b61400f439e843866c18aff2e5452e3bb3f26f0df
font_01_sfnt_off0000dd08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD08 11076 bytes
SHA-256: de0879449e58d08f8e28e20406061e3dd44bafebf23e24ebd2dc3ab71b8bd6d4

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