Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b7d46f710cbe632…

MALICIOUS

PDF

63.4 KB Created: 2020-10-14 22:56:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fc9b72812fd55da3839f1ab923a299df SHA-1: e0ce8ccf1162bb3da0c0a2e7031d5aca5ba4a9fa SHA-256: 5b7d46f710cbe6325afb2eeb6f20a7e3199c3439ff3cff300d6d1fe3897cc697
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, with a critical heuristic identifying it as a redirector link to known malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. The document body contains text that appears to be metadata and embedded URLs, suggesting an attempt to manipulate search engine results or lure users to malicious sites.

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://cctraff.ru/strik?keyword=adios+muchachos+tango+piano+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f86f503a8973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5f872a5233727.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5f8714a4f08e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8740cded2bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f871ce132531.pdfIn PDF document text
    • https://jizonuwuko.weebly.com/uploads/1/3/0/8/130814311/womakofataxope_domupagukujorip_xufepagofaluda.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/nidisetati.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/837046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366947/normal_5f8752a2bfcce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5f871fddca4cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5f874eec406f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f8716d9e410f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366389/normal_5f872b90c65ff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8804/2902/files/fake_gps_location_spoofer_pro_joystick_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/9337/7183/files/columbia_county_assessor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2381/7640/files/nafupafuzepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6071/4907/files/wawotogunepufev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9436/6626/files/xazanulozepube.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9347/3445/files/enable_xp_cmdshell_for_user.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/6080/4770/files/coleman_mach_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1390/5311/files/prebles_artforms_11th_edition_amazon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6268/8918/files/what_does_coconut_kefir_taste_like.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_off0000aea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEA0 3200 bytes
SHA-256: dd569f10d8dfa455148fe8444a695ea902bdd1892ff0fe71b371692f8289a204
font_01_sfnt_off0000ba1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1E 5428 bytes
SHA-256: 1684c1701ad9253fb34f6fad82f2c892c5f3951276f11f7da228149e1d5836c8
font_02_sfnt_off0000cc7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC7C 10152 bytes
SHA-256: 92f678273e0c3589b399d8bfe089c46ef8292f88eda89dd48bff16dc878d964d

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