Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed7d0faea447df85…

MALICIOUS

PDF

79.6 KB Created: 2021-03-30 05:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 6d490b2536ab5fe5ab92ebf8af6f0b36 SHA-1: e0ea75341988a00dc734c8b33e4e9656e88869c7 SHA-256: ed7d0faea447df852e27ad306454f6abb22a9a15928ffd6ac9ab0c29e36ef16b
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://dafemum.ru/wix?keyword=gertrude+mcfuzz+pdf'. This URL is likely used to lure victims to a phishing site or download further malicious content. The ML classifier also strongly flagged this PDF as malicious, supporting the classification as a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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://dafemum.ru/wix?keyword=gertrude+mcfuzz+pdf In PDF document text
    • https://cdn.sqhk.co/fagaxirupunu/9giehaS/7546262768.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/glF0ETP/clavinova_piano_price.pdfIn PDF document text
    • https://cdn.sqhk.co/vivugiwu/adgcgen/hamstring_muscles_anatomy.pdfIn PDF document text
    • https://cdn.sqhk.co/kufezakit/ifjha8G/difilutapofirive.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/b0e66bcc-c8aa-4968-9e76-3bf6e0ef493d/vodavefulizuxibil.pdfIn PDF document text
    • http://jegerusomeku.epizy.com/rojosujijatusumuvofox.pdfIn PDF document text
    • http://laxizibobi.rf.gd/vijemosev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b253eec8-f4ca-472e-abae-92d32b3fc633/50733338796.pdfIn PDF document text
    • http://kedekivotizera.epizy.com/how_to_tell_if_someone_is_a_secret_shopper.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/lewikep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71d23964-a3ef-4405-9b80-35f55b13d19a/how_to_deal_with_cultural_conflict_in_the_workplace.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1acc1ff0-a9bd-4823-a2e3-b2dcc98f4be2/julian_date_calendar_2020_converter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f4dc420-c3a5-4a71-b088-ca8d9e956df6/taxomiwamaxiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eec6f5c-8244-4a2a-a750-9c4a5957fafc/enter_your_product_key_microsoft_excel_2013_free.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/classroom_management_philosophy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62395883-0024-42cc-8944-43a887461af2/satiz.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/farasore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2894b4c-6c9d-41c6-87f3-f4d87513c8f2/79391698801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d8a8186-836b-4373-8fde-d81f0abfbb8e/ziguzesipikamamusepax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c854fc6-35dd-4f83-81e4-745bb84d6fd0/bryant_furnace_spec_sheets.pdfIn PDF document text
    • http://gujomodezeroj.epizy.com/83250186449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3b97373-7456-4c63-adcd-ec293d22891e/91019059545.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDED 4580 bytes
SHA-256: 0ab59cb40c2d08b92d6a8bae1a454d1582ad33bc8c7d230cb41529d92c344218
font_01_sfnt_off0000fd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD93 10520 bytes
SHA-256: cd8cb67aaeaf34831948ecf3ce02bde3d130e43e8d4593e40526535d5f76606d
font_02_sfnt_off0001217d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1217D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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