Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae06c072c25d073…

MALICIOUS

PDF

74.2 KB Created: 2021-05-11 11:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1ce6c048a0c5e9e0103e5ae1721b354a SHA-1: cd48e6346a51c8654c0177cc52ffbc46b82b5c8f SHA-256: cae06c072c25d073150155c3ebc07cd7e9c420f2f9d567f09ced2fa8e7d61448
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, with one prominent URL leading to a suspicious domain, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further indicates a pattern of using disposable hosting for malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://mezovuduw.ru/strik?utm_term=the+shack+book+what+is+it+about+summary PDF link annotation
    • http://basisemakus.iblogger.org/zekuzexedu.pdfIn PDF document text
    • http://beliyden.xyz/the_sneetches_and_other_storieszha3s.pdfIn PDF document text
    • http://bandalet.club/indoor_air_quality_monitoring_reporti5d2f.pdfIn PDF document text
    • https://jujowaganul.weebly.com/uploads/1/3/0/8/130874338/3218317.pdfIn PDF document text
    • http://rankingcoach-seo.com/22098619624pgci7.pdfIn PDF document text
    • http://probmake12.xyz/xoxosedalasewadizamuxaxiplmge.pdfIn PDF document text
    • http://fulilip.iblogger.org/probability_worksheets_high_school.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_92ed8563f6a64f8f9d26812892e6cedc.pdf?index=trueIn PDF document text
    • https://f06ae689-34e6-4fd9-b749-a5985747e370.filesusr.com/ugd/4117a9_16c48e039bca431cbdfc0bf7a484cd72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/setigafat/alone_written_images.pdfIn PDF document text
    • http://depebovibu.epizy.com/45287828972.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/korupunuvafalunib.pdfIn PDF document text
    • http://jeloneliva.epizy.com/pdf_to_word_converter_free_online_nitro.pdfIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_5fa6f7d21daf4659bd902c0eac003523.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/words_of_wisdom_for_new_parents_funny.pdfIn PDF document text
    • https://7054f9d6-44ea-4b6c-8535-0d04e7cb9957.filesusr.com/ugd/963b03_a79a7bd6bf2f442c83b9a9a453409941.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/68351513306.pdfIn PDF document text
    • http://satoposip.epizy.com/15182038634.pdfIn PDF document text
    • http://zedovapovakodev.rf.gd/33553489293.pdfIn PDF document text
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_0c55893d5f044971a3f109d9c578fdd1.pdf?index=trueIn 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_off0000e3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AB 5356 bytes
SHA-256: 5e7f9ef1fc8b0f7b1d9aed216af286035c97d09ded9972b3515f49762bc48836
font_01_sfnt_off0000f5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5CD 11052 bytes
SHA-256: 0081d40d45afadc2d6e71c8b205cb13970804f066ce74cd56e748ef05473a8be

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