Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d0dc3e5dee1a68b…

MALICIOUS

PDF

66.7 KB Created: 2020-10-08 19:45:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ed3d95d1dcee31ecf37ff1f4d4270114 SHA-1: 91f74d5e0bd8a577fe66c50e05e9d058892777f9 SHA-256: 0d0dc3e5dee1a68b8fa8d1e0ee5b304065ca666433f36da5be884fedda64a240
154 Risk Score

Malware Insights

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

This PDF file contains numerous links to external websites, including a known malicious redirector. The document body, though obfuscated, contains a URL that appears to be part of a link farm designed to improve search engine rankings for malicious content. The primary malicious activity observed is the redirection of users to potentially harmful 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=safe+agile+certification+questions+and+answers In PDF document text
    • http://wugovupub.cbcseward.com/uploads/1/3/1/4/131407316/3d86fba3484f.pdfIn PDF document text
    • http://wubinal.teachersresourceforce.com/uploads/1/3/2/3/132302978/bezuxutepomokos_tuvigalazel.pdfIn PDF document text
    • http://files.cnhcep.com/uploads/1/3/1/0/131070646/sogedabarep.pdfIn PDF document text
    • http://torale.wesdykes.com/uploads/1/3/1/3/131384481/xegikebobiwiteg.pdfIn PDF document text
    • https://site-1040094.mozfiles.com/files/1040094/98614977670.pdfIn PDF document text
    • https://site-1037172.mozfiles.com/files/1037172/89271678615.pdfIn PDF document text
    • http://xesebaw.burgessmercantile.com/uploads/1/3/1/4/131454172/4047d24.pdfIn PDF document text
    • http://files.carverarms.com/uploads/1/3/1/4/131407995/fixiwido_bipiwenexof_bemunenonubefum.pdfIn PDF document text
    • http://wakiviz.houstonhighschoolptso.com/uploads/1/3/1/0/131070340/3013116.pdfIn PDF document text
    • http://files.jelanaduncangolf.com/uploads/1/3/1/8/131871424/4135706.pdfIn PDF document text
    • http://files.executivelockandsafe.com/uploads/1/3/1/3/131383456/taginome_wezut.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/1/0266/7865/7212/files/aluminium_design_manual_2005.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2452/2143/files/lezokamilesumipidikipevi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9086/9410/files/what_is_an_aurora_borealis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5356/7130/files/madagamejejuleweromapiken.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_off0000bd80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD80 2828 bytes
SHA-256: b7f317aa0f29cd34df008dc84d8f376d2685882a57a4a5cd0d86477d0adf885a
font_01_sfnt_off0000c77b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC77B 5512 bytes
SHA-256: d2ff8abf3a9432c77dd871780785f858d7670954b20d8dfab3338ff28ca3f73d
font_02_sfnt_off0000da4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4E 10272 bytes
SHA-256: 69eb037fca9b509b0bf58c66667c0637b46bb628252f6cec8efe187742467175

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