Malicious PDF — malware analysis report

Static analysis result for SHA-256 16e96d3f2898f088…

MALICIOUS

PDF

37.3 KB Created: 2020-11-03 14:12:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0150c0ed541d5b5b33e70c2194d45f94 SHA-1: dfe00cdf8acde6e7d1b84cb9f6cc9888719eb0f7 SHA-256: 16e96d3f2898f088476fab5089e8ab29130fef4ad3f61fd986b29477caf8b782
162 Risk Score

Malware Insights

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

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, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=2006+kawasaki+kfx+400+owners+manual In PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/5724580.pdfIn PDF document text
    • https://mizunawakore.weebly.com/uploads/1/3/1/4/131406356/lurajutofedid_sepufemuxugado.pdfIn PDF document text
    • https://degujipimisa.weebly.com/uploads/1/3/1/4/131453395/d72fbe95682429.pdfIn PDF document text
    • https://zesojewati.weebly.com/uploads/1/3/4/4/134432656/faacb8c.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/fovusedurutagod_sekanener.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/4802602.pdfIn PDF document text
    • https://sizukejagu.weebly.com/uploads/1/3/2/6/132681884/2821895.pdfIn PDF document text
    • https://purolejomi.weebly.com/uploads/1/3/0/7/130776639/5074942.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/download_apk_bbm_terbaru_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/temuxow/human_body_regions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/aditya_hrudayam_stotram_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f0b3b92-d255-4d72-a132-6e204863b08d/american_temperance_society_is_founded.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15dd9c7a-0de2-496e-9cd7-5db98d6c2064/damadorarikexoruniteje.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/10545152135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53ff4f1a-457e-4138-bba1-d7fd482ae72a/41134086107.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5095 5560 bytes
SHA-256: 7caf45d6a36fcc5f9897bdf5dd2068f14646327bb62bb36a1393e4509b1f80a6
font_01_sfnt_off0000638a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638A 10916 bytes
SHA-256: d4b730481261487271b739cff80b2079867e33ea91fe5be3e1c71025c6a6e343