Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d8655b85fef4c40…

MALICIOUS

PDF

46.9 KB Created: 2020-11-01 05:33:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 27998b81b6a852747cfabc82a01b270c SHA-1: d497c6b49e6af4ef9962746bca3e44ad95769651 SHA-256: 0d8655b85fef4c40500b48ad78fd37f9b5997e68e49870de39ee9afbd0c40aa0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains keywords related to cloud infrastructure, likely intended to lure victims interested in such topics 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/aws?keyword=cloudformation+load+balancer+auto+scaling+group In PDF document text
    • https://cdn-cms.f-static.net/uploads/4381340/normal_5f8ec4f5a82f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370533/normal_5f910003cd41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366007/normal_5f875a101be42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388062/normal_5f907654ccbc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368242/normal_5f8ccac41a14d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f93b730a3b3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f8afb7d99d8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5f8b2163b3830.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/1/0430/9155/8551/files/bujiruzusikewolotovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd7f08f9-2a09-43a6-b909-a7ff055c9e25/fetezezozupupodujinatexun.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/luzozasobakaluvevafavit.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/xidaxovotevixe.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_off000075f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F8 5520 bytes
SHA-256: e0a555e640f1a9cb9397648ca4237ba3edd11f2a969f4b4f794c371735cb91a8
font_01_sfnt_off00008899.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8899 11360 bytes
SHA-256: 07dbff0068450cff35e8c00c851392a99675e59b4b00575b020b31e8c3414f71

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