Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b9b36dd7e456ed…

MALICIOUS

PDF

41.4 KB Created: 2020-11-04 07:09:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e17e1ab436b3c9e255d48f11a3864c08 SHA-1: d3f51b6cd01129f87ac1d9ad7168432c6d1674d1 SHA-256: e0b9b36dd7e456ed87a2c8c8e46d46b631df54b299ba45fa96543de949927adb
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a heuristic firing for requesting recovery secrets, indicating a phishing attempt. It also includes a link to known malicious redirector infrastructure, which is likely used to deliver a secondary payload or lead the user to a phishing site. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest a social engineering attack.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=the+definitive+guide+to+the+xen+hypervisor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5f917313e94a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_5fa0996664e30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401559/normal_5fa0c5a191f06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5fa2091f01f2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_5f9f06274d566.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/fofeguj/nazukat.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/s-215_instructor_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/kingroot_download_english_version_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36819776-75d0-4a56-bc1e-1f62748abcdb/21555878757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9225d1fa-f52c-4309-9b27-79187234d083/82144659007.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/nero_star_smart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f28187be-acbe-47bd-9bd7-b15dda0b4953/sokuvimudadi.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_off000060a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60A4 5240 bytes
SHA-256: 5c501cece97f1e637a02ffd49127f8a209c70d0335eaa5f81743318bcfcc7a16
font_01_sfnt_off00007290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7290 11400 bytes
SHA-256: 52cdb278ac5afe7b8ec8f3484f27ad0074a6724480ed8a1fa86c9761518f0cdd

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