Malicious PDF — malware analysis report

Static analysis result for SHA-256 710604ecc92bc7f8…

MALICIOUS

PDF

69.3 KB Created: 2020-12-18 00:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: f0306bb5c0f4825b26453139649fe5c4 SHA-1: cf28ee6b2faf43b17ff4337f83b5276a437af812 SHA-256: 710604ecc92bc7f83c4a5f07775329e04a13a17a22158da12704ea07bc20a511
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external resources. One of these links, 'https://traffine.ru/123?utm_term=powerful+african+queen+names', is flagged as a known malicious redirector. The presence of a link farm and the malicious redirector strongly suggest an attempt to lead users to malicious content, likely for phishing or malware distribution. The ML classifier and ClamAV detection further support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffine.ru/123?utm_term=powerful+african+queen+names In PDF document text
    • https://cdn-cms.f-static.net/uploads/4454819/normal_5fb7967044de1.pdfIn PDF document text
    • https://momiweporav.weebly.com/uploads/1/3/4/7/134745900/2026060.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405459/normal_5fcbc7bbda341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417422/normal_5fa50c0358c33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530937/normal_5fc297516bf64.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/33dcd0e8-59cf-4595-b149-3f88a76417b8/awp_2020_dates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d23fb636-aa28-41d9-b41b-e1286d3688ab/49432346287.pdfIn PDF document text
    • https://s3.amazonaws.com/vazisi/jarajuzukazud.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/autocad_2014_to_dwg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5558d863-b4f7-4a62-9e54-5f40b352d104/25772224919.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f942bc44-5dc6-4fe2-9a0c-5db86dd4ba3d/63463323627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2b66aa7-781e-44d1-9abc-95f208236eb7/how_do_i_reset_my_icloud_password_on_my_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d10231-777e-4a99-9b11-4e12666b6ff9/panama_canal_worksheet_with_answers.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_off0000d43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43E 5244 bytes
SHA-256: 0f96ad9fcc7063ad994d991a9a73fba9a3a7d00046e9c516f11c2562caf3c055
font_01_sfnt_off0000e615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE615 10012 bytes
SHA-256: f08988403f6046e0346ac4809cf289249f6cadcdb99431dba854f6f3b0b0753d

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