Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9a9d9ec9026a503…

MALICIOUS

PDF

91.2 KB Created: 2020-12-29 16:15:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 43b33f7300f3e12d5247950f6bffcf0b SHA-1: d760e40d5731b9bd070c4fe136899f01af0b2fa8 SHA-256: a9a9d9ec9026a503826dd5e072b0502a95caa3255c2c979a0c37ee297054b738
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely intended to lead the user to a phishing page or a malware download site, disguised as a game walkthrough.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://traffmen.ru/strik?utm_term=sandship+crafting+factory+walkthrough In PDF document text
    • https://static.s123-cdn-static.com/uploads/4481155/normal_5fc79bfeb8686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_5f8d30618d4b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379603/normal_5f8b5ba23fe5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483335/normal_5fb44af3d7c84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483836/normal_5faf48badb851.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445118/normal_5fafe8976bb10.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/qjagghg/make_a_price_list_online.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451940/normal_5fb6aac93796f.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/cea40383-dea3-4642-bf20-6fe3383a21c7/how_to_pronounce_stella_artois.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/unblocked_age_of_war.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82aacc82-cc98-4b1d-b362-a1fbf3fd434c/centre_de_skapande_fifa_12_till_ps3.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/video_call_software_for_windows_7.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/acuerdo_de_paris_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/zonakelenizugijotidot.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_off00012853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12853 5776 bytes
SHA-256: 4055ee47bd270513e24bf971f49799586d40e808effe8a70ac5e3d31aa4835e5
font_01_sfnt_off00013c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C14 10648 bytes
SHA-256: 0044b57ccf5b1d4f975c45d0b7835e9851582a21c44e3e46e7a0fe1cec8dfc28

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