Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3a21c4302f9b1f8…

MALICIOUS

PDF

83.4 KB Created: 2020-12-16 16:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 495f7cd417c29e3fa4c03aa4e0f90a18 SHA-1: d864984e05886546dcc2e0ebf1014183c3a02d79 SHA-256: f3a21c4302f9b1f8f03819982545739b804c8a79447da9278d950ee593536387
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://gettraff.ru/aws?utm_term=c+form+application+procedure+in+maharashtra'. This URL is flagged as malicious and is the primary indicator of the document's harmful intent. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment that it is designed to lure users to a dangerous site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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/aws?utm_term=c+form+application+procedure+in+maharashtra In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448346/normal_5f9e05c52f3c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375209/normal_5f8a10a022477.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486206/normal_5fb8a3df04c54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388285/normal_5f988eac33998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457302/normal_5fbf4df6142e3.pdfIn PDF document text
    • https://liwavijej.weebly.com/uploads/1/3/4/3/134379327/9986323.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/0d7b7ca4-7c79-433c-8e56-ea897cff0792/fire_chief_wood_furnace_fc1000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80861e4e-e0f4-4bc7-af66-fb60155a65f8/49610793970.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfcd6f403f5353fd8f68b6/t/5fc1831e08845d0924c3dacb/1606517535368/fayette_county_common_pleas_court.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97082e3a-95fd-4721-bec9-0fe86c08bcfa/nintendo_3ds_capture_card_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8a2c0d-2dff-4fe7-a888-9732fd347463/tivifekukolabokijajobor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8843f2c5-b9dd-454e-8629-0d427d5649b4/hands-_on_artificial_intelligence_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b9842d0-c752-40c5-8fc2-2eae9d8b8a86/vuxovuxuvilef.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_off000109e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E8 5300 bytes
SHA-256: 5d426b5e7dcf4a43fe99987761d3a81b2f704a4d80b799bd362a170dc6dbd296
font_01_sfnt_off00011bb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB9 10964 bytes
SHA-256: cb667c8157d3b293f7a95fda7c653809a2c0a2b292eebb9da46407b0a416f8b0

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