Malicious PDF — malware analysis report

Static analysis result for SHA-256 2187ceafc7dd5010…

MALICIOUS

PDF

45.6 KB Created: 2020-10-31 10:45:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 375bc484d3bd387d211c8c24a557002f SHA-1: d31ef19df822d8750731f72557c625d21523c9b9 SHA-256: 2187ceafc7dd50102ca57a56835ffa826188ef3d915fc058e57dee2f1359aeff
94 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains text that appears to be a lure for a thermostat manual, combined with the malicious URL. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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://ttraff.cc/123?keyword=honeywell+t8001c+thermostat+manual In PDF document text
    • https://luleloneluso.weebly.com/uploads/1/3/4/4/134450102/dapebexinowidot.pdfIn PDF document text
    • https://jamisovuropasag.weebly.com/uploads/1/3/4/3/134396730/4cf30e7b2.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/aa8853f1611e3a.pdfIn PDF document text
    • https://rixokofumi.weebly.com/uploads/1/3/1/3/131380985/1156c2d70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367297/normal_5f8c8dee2dbb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372100/normal_5f8b5d6289c01.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382973/normal_5f9193dccda72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f8f24e740fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369665/normal_5f887b7b73bf1.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/1/0433/5448/8990/files/97917196427.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1328/2215/files/microsoft_project_to_converter_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7451/9191/files/31012010900.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/3141/8807/files/83177541209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1141/5959/files/kazepeju.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_off0000725e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x725E 5584 bytes
SHA-256: eed184a9adb50e644163d685e90e45fd208bcfd211ed2a340e7bc7001378c0d5
font_01_sfnt_off00008545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8545 10524 bytes
SHA-256: 6d09a4d113d641356fea103068268e94fa216125c97a552e6ff99576e1ea6772