Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8f331b5f77b609…

MALICIOUS

PDF

68.6 KB Created: 2020-12-14 08:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 91f8289dc05ec5634141c7c67a49cf13 SHA-1: 707c6527ba35a1fcae1ec024a12bdfc85bffab12 SHA-256: 6d8f331b5f77b609907e31981c288d98646c8fd6d94d5d4daa3264229d9a7617
214 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it links to malicious redirector infrastructure and is part of a link farm, suggesting a phishing or scam attempt. The embedded URLs, particularly the one associated with the "durable power of attorney texas pdf" keyword, are suspicious and likely lead to malicious content. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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://cctraff.ru/wb?keyword=durable%20power%20of%20attorney%20texas%20pdf In PDF document text
    • https://tinutenuku.weebly.com/uploads/1/3/4/6/134664278/5553bdd09d206.pdfIn PDF document text
    • https://biwewijusegi.weebly.com/uploads/1/3/4/5/134586848/aa028062990.pdfIn PDF document text
    • https://sobemifukoku.weebly.com/uploads/1/3/4/8/134887972/74c919ab1.pdfIn PDF document text
    • https://tefawizudarezuf.weebly.com/uploads/1/3/4/6/134640126/gigejilipedawi.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/9904545.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/5fc77924504bb4653ce58261/t/5fcb45b5a0b42e3566a54407/1607157173446/50320395271.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/disha_neet_books_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d8d416f6d44b07d7d45f/t/5fd68465d654060362cd276a/1607894118717/forgot_password_to_unlock_protected_excel_sheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc36a30a13a450bab0439a0/t/5fcd8f43f94b6402b233c394/1607307075998/cute_cakes_for_teenage_birthdays.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cd580a2757459bfbf001/t/5fc62130173fb5383b74d813/1606820144528/western_cowboy_shooting_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc53ef3116eb00e3c68816f/t/5fd1b7179a9e5443ac797457/1607579416466/xobox.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/lefetajivaxejuzuwemovujok.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/interior_angles_of_a_regular_polygon_worksheet.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1F5 5436 bytes
SHA-256: 23db48a9cf2f093b23ba619ba8ff215b645267044dd04a6e0e21707f84bd4b7a
font_01_sfnt_off0000e498.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE498 10332 bytes
SHA-256: efb845b423cad9d3646923028c71460af28cfdafd9f84da99a2ffe4ed8021f5f

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