Malicious PDF — malware analysis report

Static analysis result for SHA-256 0296a09c29b7c162…

MALICIOUS

PDF

62.3 KB Created: 2021-02-20 00:14:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 7b13ad84b229d12ce423afe62264611d SHA-1: 38c42433e651a4edce2a54c43228849cbfac3487 SHA-256: 0296a09c29b7c162608eb3391c2e05d87951250092aecbe14b64b868dbc9d047
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to mimic search result content, further supporting the phishing lure hypothesis.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/wix?keyword=operations+research+problems+and+solutions+by+vk+kapoor+pdf PDF link annotation
    • https://kajagopop.weebly.com/uploads/1/3/4/7/134729443/timawu.pdfIn PDF document text
    • http://todipagomize.iblogger.org/barbie_girl_song_video.pdfIn PDF document text
    • http://jodefugivu.22web.org/64811171654.pdfIn PDF document text
    • http://expressday.online/harvard_business_review_espaol_201489iyz.pdfIn PDF document text
    • https://jedurabononip.weebly.com/uploads/1/3/1/4/131453193/zejolujizufanejazok.pdfIn PDF document text
    • https://zekenegelu.weebly.com/uploads/1/3/4/3/134390475/f0dd2259ce.pdfIn PDF document text
    • http://remontlegko.info/marrow_app_hack_apkupzfo.pdfIn PDF document text
    • http://dommasters.site/interview_questions_on_control_systemsrqht3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://perorudo.epizy.com/15503485546.pdfIn PDF document text
    • http://kuminatunajovop.epizy.com/tagatizerokofikobidojules.pdfIn PDF document text
    • http://mokupemoraworal.epizy.com/12755204573.pdfIn PDF document text
    • http://bewebumaxof.epizy.com/free_recipe_costing_template_excel.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_off0000b56c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56C 5788 bytes
SHA-256: 7650abc4f8aa64dfc9296c522913f8bdbcddc6ccfb983e5743f7216ae40ab0e1
font_01_sfnt_off0000c8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F1 10380 bytes
SHA-256: 62d4465dbab291c7e09bbdcca4cd59c81aeb90414f1c49d885761520132987fe

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