Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01e010b2f42ccbb…

MALICIOUS

PDF

89.2 KB Created: 2021-06-03 02:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c474723b92240a3e9aac1bc8b18c7dc2 SHA-1: 561335926e9911c7ca115868824f1f90530a9739 SHA-256: f01e010b2f42ccbb411e9c043813d95f142fcd2e9bc09658000ef0244029536d
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://chcial.ru/pbw?utm_term=how+to+use+pure+daily+care+diffuser PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379723/normal_60202bc83d08a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482619/normal_601aafa8c3b70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372358/normal_602876835be3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383304/normal_5fceb58b7ba32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_6026c039989a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_600b54cb33e62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456985/normal_5fdb8ddc74473.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449177/normal_606bce29db7b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408476/normal_5fc6aa7965b36.pdfIn PDF document text
    • https://dajepulexito.weebly.com/uploads/1/3/4/5/134591334/5787115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419206/normal_600a211aed0b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5fe7050edd7b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382780/normal_60093f81dfb67.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455197/normal_600cec8429936.pdfIn PDF document text
    • https://towizitubozabo.weebly.com/uploads/1/3/5/4/135400713/muzesoxefoz.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/5d304ace-0a0a-4b9a-b253-559e830692da/vevubuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3239f535-9f17-4860-bf84-d420e4842899/1285789386.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35531d4e-2305-4d0f-b97a-87b14164aceb/febekofugunuxasil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3185f10b-99c8-446d-af8b-9cd640212f3d/48005696049.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5832c445-bf89-4ed3-b80e-4a5b2b8ddcdc/netgear_gs108t_default_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c6d72bd-2e21-4714-81fa-82f8bb290bef/ic_engine_components_design_ppt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7f46d77-5f4f-4f1b-b99b-2c0632bfd4ce/how_to_set_up_yamaha_home_theatre_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/390ed2e5-7556-4d60-9c9f-94aa2418ffa8/92542801741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcc9246e-35f3-4bac-9fca-1fb9fa85fbc8/dinezeb.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DE 5080 bytes
SHA-256: 5ab1fc0ab5330fe9233e4c827f0578495110bae419698c28fc15feaf1843688b
font_01_sfnt_off00010b58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B58 11224 bytes
SHA-256: 2d545c726c871f1fb9b09e8594496975fff64a37d2b30690848bd544b70a3123
font_02_sfnt_off00013201.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13201 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848
font_03_sfnt_off000146c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146C9 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2