Malicious PDF — malware analysis report

Static analysis result for SHA-256 39d8183a69be988b…

MALICIOUS

PDF

52.5 KB Created: 2020-10-08 06:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 17255c60d2fc4a1412ca1afa28545c87 SHA-1: e686dc2621a3af902611e385f084156b06c7b5f4 SHA-256: 39d8183a69be988bb24493c4dcd67de43c975aa59407ea0adde47f353ec13f83
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=download+line+lite+apk+ios In PDF document text
    • https://site-1038777.mozfiles.com/files/1038777/85402957836.pdfIn PDF document text
    • https://site-1042103.mozfiles.com/files/1042103/sesudezewarilugu.pdfIn PDF document text
    • https://site-1037890.mozfiles.com/files/1037890/wezowowota.pdfIn PDF document text
    • https://site-1040319.mozfiles.com/files/1040319/12658173373.pdfIn PDF document text
    • https://site-1036724.mozfiles.com/files/1036724/kapiselujegoravopi.pdfIn PDF document text
    • https://site-1037260.mozfiles.com/files/1037260/pexeredamexoda.pdfIn PDF document text
    • https://site-1036760.mozfiles.com/files/1036760/15967098423.pdfIn PDF document text
    • http://files.pbfitnessmidleton.com/uploads/1/3/2/6/132682852/727507.pdfIn PDF document text
    • http://files.allfloridapaint.com/uploads/1/3/1/6/131606343/wulebipimux_lapexudojo_josuxerulozope.pdfIn PDF document text
    • http://giwedod.laocdb.com/uploads/1/3/1/4/131482916/jagewomum.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/81c3fbd7-f5fd-4ccf-9732-e5c644b1f923/56025817681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/860f1c24-8268-4321-87fd-d53eca955c07/8791563355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3e41e4-398e-4c24-9280-54a0b39c4631/rulikox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41dfb5a5-c4f9-4f49-9ccd-1aee74c71a0b/sagizevukeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c7bc6ba-1b92-40a9-9289-9c697c73fe21/95832964767.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E27 3064 bytes
SHA-256: 2a78fbefe46b25f9d18b6f334187863c3f0903daa94fa9b07c9f3a0871dc7472
font_01_sfnt_off0000691f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x691F 4800 bytes
SHA-256: ad4aec6d96310f03cd29b9cb3897ea32bbfd714507c4f8d2c852e49edae5f62d
font_02_sfnt_off00007991.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7991 12100 bytes
SHA-256: 4d34c433823bbd4fcec42b462ba6afa621fcae1b73a50f4164cb620ec360f83d
font_03_sfnt_off0000a0e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0E4 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449
font_04_sfnt_off0000b613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB613 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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