Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d46ca9f517893a…

MALICIOUS

PDF

75.6 KB Created: 2020-12-17 01:45:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: f34e674c6b1531e2d65e442f2b0f3a30 SHA-1: b4620ca688a0609cbb71d6db1c8db18eddeca15d SHA-256: 25d46ca9f517893a821d7261b22f4dc590f7212680bfa69d53c37829098d20ab
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with at least one identified as a malicious redirector. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' indicate a pattern of hosting numerous external links, likely for SEO manipulation or to distribute malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of embedded URLs and the overall structure suggest an attempt to direct users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gettraff.ru/aws?utm_term=delegation+of+authority+matrix+pdf In PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/8218905.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/xasotogubusagadax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420907/normal_5fb547983aff1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475854/normal_5fce38ce6ba71.pdfIn PDF document text
    • https://letezinujafi.weebly.com/uploads/1/3/4/9/134901841/getitepadofitekoge.pdfIn PDF document text
    • https://dirigesibujov.weebly.com/uploads/1/3/0/9/130969991/vijeluwor_wuxixezoti_zumuvixerazevef.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/300591b5-71df-4853-8268-2f1ef27fdac7/south_park_halloween_special.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba3a5dd9-c996-4a9f-b5fd-e0d700e615ee/chapter_11_cell_growth_and_division_worksheet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9296f08-04b7-494d-b9d0-8d615f086c34/contabilidad_administrativa_y_financiera_libros.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bf7a0b-f984-4aa9-9afa-4855b0f014e8/77304537352.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884338a8-0814-4a78-aa5c-31301a33cf2f/bijome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4748c3-1270-4e74-908a-e298421c051c/meguiars_headlight_restoration_kit_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41836a86-8eef-498b-82d7-c10bd5b02c53/a_stolen_life_book_free_download.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD735 5444 bytes
SHA-256: 10cea6b162831105b8ea68994c20e16e70236a1774e8d852fd1249d0d9721555
font_01_sfnt_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 10028 bytes
SHA-256: 79fcede7854b55e7aad6e073c5591a8d477e6ac07c99dda6c5270d2f4a27e9d0
font_02_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 16120 bytes
SHA-256: 988a316f543fb787c6e548b45acc8bfd59cad13da049e9ddbad57dfbfbb9e7cc

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