Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57d888b4342db22…

MALICIOUS

PDF

86.3 KB Created: 2020-12-24 13:01:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 7a40424ffb08ba6586230372b572111c SHA-1: 755eb20ec3e33d961874a6ee5c6586480e8c8fc7 SHA-256: f57d888b4342db2226e9f2891557019993129b958b162d75100e6d1fff7e0a23
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF file contains a lure for remote support tools, indicated by the 'SE_REMOTE_SUPPORT_LURE' heuristic. It also links to known malicious infrastructure via the URL 'https://gettraff.ru/aws?utm_term=sample+business+case+template+powerpoint'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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=sample+business+case+template+powerpoint In PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5faf83fdde9dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387921/normal_5f9cf1c7796b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5fccdf0ccb9c5.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/biihjf9/splashtop_streamer_exe_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503035/normal_5fb544496b5a8.pdfIn PDF document text
    • https://xaruxetadelu.weebly.com/uploads/1/3/4/4/134478950/4835554.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/ffeedb3f-f9c9-4660-bb19-680b60f004d7/test_6d_ap_statistics_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/befevifa/turinijigavuvopuxa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/047ed9cb-3b20-4ce2-bb87-698129f98171/11132738920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef406409-0951-42dd-85ce-195fa16cc13a/enrico_iglesias_son.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/ballistic_game_free.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_off000113da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113DA 5412 bytes
SHA-256: c2222ffff5ea8fe430c60be2aa3f4f5d483bd1eb6b9ee23151d73a71a47ff006
font_01_sfnt_off0001263b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263B 11212 bytes
SHA-256: 61ca2e63daa3407ff75a43372830ef5f69e0f3b9d6a06312cd5aea21d5563c46

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