Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fe8550d5ed6d99…

MALICIOUS

PDF

129.7 KB Created: 2020-12-02 08:15:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7bb1f69a3ff35b93ad2cfb255d93e9a4 SHA-1: df78cdeddee5ca2240c4fe3a211f72ee00f69fc8 SHA-256: e5fe8550d5ed6d993a07599804103b8f5439ba8b59cdbda2fc1a8fb310505689
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffking.ru/aws?utm_term=punjabi+bass+boosted PDF link annotation
    • https://nepufetok.weebly.com/uploads/1/3/1/4/131438640/4044917.pdfIn PDF document text
    • https://wilubowedawiwo.weebly.com/uploads/1/3/4/5/134528918/3716454.pdfIn PDF document text
    • https://jugovufepejeja.weebly.com/uploads/1/3/4/6/134611134/3fc0f8c483fd.pdfIn PDF document text
    • https://felomogolupa.weebly.com/uploads/1/3/4/3/134345494/1b89e601a513e41.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/4117077.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/f68d1c21-ae07-4d83-a5b7-607bbd1ea4fd/57368066042.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc0e9181-f5b4-4115-8615-df8732b31a22/nazab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155f5ff0-bb6a-445c-86e6-f937af6c108a/bedojaxi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7817b000-a1d2-45bf-97bc-5bd3caeb8e23/debikaxeguzomomaminimud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21774956-a68f-4f60-906d-ceb28606aa4f/55860046443.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fca91a26-33a5-43eb-9e51-fdc84dd5b78c/immortals_of_meluha_trilogy.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
    • 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_off000197b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197B0 4908 bytes
SHA-256: 6c10a8170e7836e02c87a3396789fe1788b07792cbf530e380215e745c15a987
font_01_sfnt_off0001a866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A866 5280 bytes
SHA-256: ebd6131d872c9d42e63072dff4a34c1a5e0337d1dec2fea953674edb5b27076d
font_02_sfnt_off0001bbd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BBD2 12124 bytes
SHA-256: 2b3b25a58dd06b652511586c6dafe88dbdf11e17be96c121147631552402ae02
font_03_sfnt_off0001e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E3C0 16388 bytes
SHA-256: 3276b6ff2e229b8126f9e2d0ffb02f954f297360052cb25b02791578f933e6f9

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