Malicious PDF — malware analysis report

Static analysis result for SHA-256 511052a9f9ec301d…

MALICIOUS

PDF

83.6 KB Created: 2020-11-28 00:23:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 1c02e3fd4cff06688cb8e10b2fad21b1 SHA-1: 6848399dc1055bc3f6fa80f698b572a8ad0e4959 SHA-256: 511052a9f9ec301de126c54634846722a6d0537ad74e987bfa2744ad6fdba843
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with a high score. It contains numerous external links, including a link farm heuristic firing, suggesting it's designed to redirect users to malicious websites. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9892

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
  • 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://traffset.ru/strik?utm_term=google+translation+code PDF link annotation
    • https://bujupovira.weebly.com/uploads/1/3/4/4/134472582/mugubudofaketuz_nipuzokademel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378830/normal_5f97ea11e3745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_5f9e130c909e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452206/normal_5fb456b91d081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416322/normal_5fb35f9ee6f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475859/normal_5fb03194aed94.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a97f9acf-cc73-4000-a370-3e49bf6db580/7998444542.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aea6cccc-2865-4913-b086-d9cb0d7cbff0/besonufalesole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4ed8bb0-3ebf-4958-8755-97bb8b44a695/30883619030.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4F0 4924 bytes
SHA-256: f10b35c9acebae990c89b3d18a779f4952a6eb75846d81616f90d5c6d19003ff
font_01_sfnt_off0000d5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5AA 5768 bytes
SHA-256: 2a1e8aef3a4a073bb7f519dd3095e7e6c1f7d25bbc2d2f1b2cd7e43d3ab650c7
font_02_sfnt_off0000e41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41E 17512 bytes
SHA-256: aa430888580168fd527c8e441e723b3aa751dd65cdbc376b82ca0cbb12987f0c
font_03_sfnt_off00011679.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11679 18128 bytes
SHA-256: f76e0116deaa5fe916e0a7b5b93aa053d442307f0c78cd381369ab7a1b9571d5
font_04_sfnt_off00013310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13310 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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