Malicious PDF — malware analysis report

Static analysis result for SHA-256 57b49742fd0beecf…

MALICIOUS

PDF

70.0 KB Created: 2020-12-10 04:22:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f9fcbb543f2c7f1cc60f80e77844d31b SHA-1: b92dfc02425ab1af3b5b01b6d7d47dff2ece374a SHA-256: 57b49742fd0beecf05865c5dc0ea6a59168dde678978abe6d97f713567f92ae9
164 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a link farm and an embedded URI pointing to 'traffset.ru', suggesting a phishing or malware distribution attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious intent to redirect users to external resources, likely for downloading unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=download+blackmart+apk+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365634/normal_5f9a8e52c8462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f9cd7f1084af.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/3326255.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5fb5693c19acb.pdfIn PDF document text
    • https://funebaxap.weebly.com/uploads/1/3/4/3/134399245/ximinefo.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/5fc0dc49affbf90a66ea44d1/t/5fc89790dcb5b260797faace/1606981522019/shortcut_to_open_device_manager_in_windows_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f0de5bcb0228a282afe8/t/5fc67a56bc819f1cf4b845d3/1606842966752/90385025607.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f7efa04221c7117e003/1606377343855/binary_fission_and_mitosis_in_eukaryotic_cells.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/google_sheets_vlookup_return_multiple_values.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53f742cb-cba4-4e6a-8d43-91bb583d5c0f/34109349573.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/key_informant_interviews_qualitative_research.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0deee1c8c74131431a276/t/5fc6230a145a8629dc833460/1606820619370/gibotisosunu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe02bfe6d49a06bb57a774/1606288063778/as_per_your_request_please_find_attached.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3d3f7084698658e709650/t/5fc75114a038a451bceb3655/1606897941167/edge_lighting_samsung_s10e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f763d8ea-8175-4511-a5a2-31d38474162b/doravoranumurulu.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_off0000d38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38A 5416 bytes
SHA-256: e08dc362f2f0c8f26c35e93bae23db81cfee37702e53c0f6fb0f19500780af83
font_01_sfnt_off0000e5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F8 10936 bytes
SHA-256: 6b7acd5136c97bdb54392fbab8f1c6978735fa60f6c2cd441ae086752e4ef541

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