Malicious PDF — malware analysis report

Static analysis result for SHA-256 f72e5f552535cf6c…

MALICIOUS

PDF

46.1 KB Created: 2020-11-02 08:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 585706a26b9a24aa102fecc719b2a79a SHA-1: 2e9be89c55c967ab81c5e7f18531fc7a2277bcd3 SHA-256: f72e5f552535cf6cc3d7896ed147ba8841db2ff1e69cbf12ac6de267ac73e2b4
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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 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/strik?keyword=ford+1600+tractor+parts+manual+pdf+for+free In PDF document text
    • https://roxejane.weebly.com/uploads/1/3/4/4/134486752/nizajud.pdfIn PDF document text
    • https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/nememosesepeg.pdfIn PDF document text
    • https://ririrufazerox.weebly.com/uploads/1/3/4/5/134501654/vupufake.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/9559360.pdfIn PDF document text
    • https://tilobumofiraji.weebly.com/uploads/1/3/4/4/134492377/nokopibesivew.pdfIn PDF document text
    • https://bonunobomatujo.weebly.com/uploads/1/3/4/3/134318799/xolaminutozaz.pdfIn PDF document text
    • https://nadosivilir.weebly.com/uploads/1/3/4/3/134316305/3b77e.pdfIn PDF document text
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/gemapetekedalaza.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://s3.amazonaws.com/susopuzupure/written_after_swimming_from_sestos_to_abydos.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/autocad_2016_activation_code.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/4482/9856/files/dizutoxelepure.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/85648711419.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/18067216659.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/4974/4062/files/9776967496.pdfIn PDF document text
    • https://s3.amazonaws.com/lixasifasi/89226605784.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/bncc_2019_ensino_fundamental.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_off000065cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CD 5440 bytes
SHA-256: c256ba0580bd86e919c2fcad09573da24463162aaaeca1e33193edf7a5675805
font_01_sfnt_off00007832.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7832 10640 bytes
SHA-256: 76959a6d344750575ccdd70e3dc96f5434ffbf5ab666e4c25b3871a302ce869f
font_02_sfnt_off00009cbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CBB 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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