Malicious PDF — malware analysis report

Static analysis result for SHA-256 0045c97853bd512e…

MALICIOUS

PDF

59.4 KB Created: 2020-12-07 02:30:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 36d25d82941e9c593344e1efcc74ca38 SHA-1: 78807a3491d3cc9d35ba06e30c5b237a2882a732 SHA-256: 0045c97853bd512ea3cbfef913b6061efa0c0a8c6a36b835dfe408cf14dd6765
214 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to SEO-optimized PDF files, suggesting an attempt to manipulate search engine results or distribute malicious content through a link farm. One critical heuristic identified a link to known malicious redirector infrastructure, indicating a phishing or malware distribution attempt. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/strik?utm_term=don+miguel+breakfast+burrito+cooking+instructions In PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_5faaece84a3bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_5fab9552f30a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426688/normal_5f97d1ba8c75a.pdfIn PDF document text
    • https://lutesikesopisej.weebly.com/uploads/1/3/4/8/134884151/8629825.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc15c11ea4a794d564840ae/t/5fc5c9676457125654049dbb/1606797672470/reinforcement_vs_punishment_scenario_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1cfa22cf09257bd7273ee/t/5fc6a1d71972c46e3c88281c/1606853080619/sofupuvuxunodipomomesa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61948fd8-0cc7-4d77-b3ef-30878c5907f5/the_defining_decade_why_your_twenties_matter_and_how_to_make_the_most_of.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba455da-506d-4bcc-84a4-26ebb8c926b4/mukilorewenuwuk.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6763d68612547ed8438d4/t/5fcd72e2cded405bb8eda6dd/1607299812539/ligijo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8e8d8ab-f79e-4f36-8961-2c707816e215/tubemate_2.2_5_free_download_for_laptop_windows_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc27e990a2757459bed0688/t/5fc37d6b4e98326c027e21be/1606647147815/giant_hamster_ball_cheap.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fd9af9866f3fd2d4d777/t/5fc216494e98326c025824d3/1606555209980/mosudevoz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf62a5145a8629dca8e15b/1606378150654/jejisepovomikiletegofov.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_off0000ab76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB76 5404 bytes
SHA-256: aaf491e25a8557dcd942c1a225ad87ecae21b52a4247026cd7919666af8d21d1
font_01_sfnt_off0000bdcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCF 9808 bytes
SHA-256: b2072e805fcba9cc478459e43e3cba03256f23bd65f2fa30055e62fb66505a34

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