Malicious PDF — malware analysis report

Static analysis result for SHA-256 95b97b28480d1f35…

MALICIOUS

PDF

95.4 KB Created: 2020-12-10 23:31:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: d9d64d59d54d07dbf3646d75700907dc SHA-1: eaaf4cddcfa46431a109aa33e838bc2fdd290067 SHA-256: 95b97b28480d1f3557fb21cc07dc03b2506067f4406f73b19e65e2a3aa7d6bcd
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm designed for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure. The ClamAV detection and ML classifier further support the malicious nature of this document.

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://gettraff.ru/aws?utm_term=amharic+bible+free++for+laptop In PDF document text
    • https://cdn-cms.f-static.net/uploads/4428334/normal_5fbf002f39b93.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/1da8dcb23f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454043/normal_5fc7d8134c510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471704/normal_5fca38a467ee1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422382/normal_5fc5d26745ffc.pdfIn PDF document text
    • https://wexipemeb.weebly.com/uploads/1/3/4/8/134860193/wewoma_fizitise_vageladenukol_rapon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479210/normal_5fc2030d26f83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402252/normal_5fa0f69dc45ce.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/5fc5922424b06a7eb31f4865/t/5fcd673483d2ac65cc26ba45/1607296820403/57276666951.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/fajuvobetilolawuwala.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/diablo_2_barbarian_leveling_build.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/37341012026.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/29992095284.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9A 23740 bytes
SHA-256: b4f17422529bbaf37ec14e7c8d0676c5c249f55c19ec3a6abfd3f92505d90cea
font_01_sfnt_off00011a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A76 5204 bytes
SHA-256: 6d42fb6077bc51dedced40f4fb8fb7b43113fe638273061a1b0a1fb98c6e6a99
font_02_sfnt_off00012bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BFE 14728 bytes
SHA-256: 75e3ffcc0d5bc974d3d7a3b476f0eb2883b32e300794c6b1f899d561f8cdba97
font_03_sfnt_off00015ae7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AE7 16164 bytes
SHA-256: d781c508aaf473e50263a6aabc3f4161b7fa10724c54bb8d35addee38a7f1c44

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