Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fabd454091b9d7b…

MALICIOUS

PDF

110.2 KB Created: 2021-04-18 11:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 14b9505b83a9707af3e09f50e18062c8 SHA-1: a86730380059996e2220026ef8cab19b73d8ac23 SHA-256: 7fabd454091b9d7b49da0e8f7a09185fc3170562328efb58605ef6634bf04751
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link impersonating Microsoft, directing users to a URL that does not match the impersonated brand, suggesting a credential phishing or malware distribution attempt. The presence of embedded URLs and the PDF structure itself are indicative of a malicious document designed to exploit users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://resalured.ru/strik?utm_term=panasonic+kx-dt343+instruction+manual.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/strik?utm_term=panasonic+kx-dt343+instruction+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4506200/normal_5fd103e371ed5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_600d4fbc43dea.pdfIn PDF document text
    • http://rakuxijewimafud.22web.org/sajimikotawejekisogifol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457008/normal_603635d75d753.pdfIn PDF document text
    • http://dezirutumevolu.iblogger.org/process_approach_to_management.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459341/normal_5fffb95931efb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413013/normal_6061a0648fdb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459175/normal_5fe0d95d9441c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459174/normal_5feaf2bce8d02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475391/normal_60222f4342d8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379387/normal_5fdf12bb7080e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_5fd7981280e80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_60176b0665adf.pdfIn PDF document text
    • http://bedebatosisazov.22web.org/99276336610.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dijazulebok.epizy.com/zenifamuje.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/rivije.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/99526157303.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/woviruxa.pdfIn PDF document text
    • http://wekotegilufa.epizy.com/97963963610.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014855.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14855 5268 bytes
SHA-256: 3e62c6332e509e61abdee9ac2a2fbd4ea4e865a8a18571ccdf3a0a80dbe805e5
font_01_sfnt_off00015a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A25 12948 bytes
SHA-256: 8608fdbf705077f103e45ec42aae6dfc68db7b339c8ddd6d5afa36682aa4ca9c
font_02_sfnt_off000184cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x184CF 16724 bytes
SHA-256: 52754a7d1d2358ede786b2c09a39699d97dfa3a6b298bc3e88c538df354e3499
font_03_sfnt_off00019c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C55 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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