Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b152409ed0a80d7…

MALICIOUS

PDF

89.4 KB Created: 2021-03-01 22:42:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fc7d7200d654287b4a2b6afe820f648e SHA-1: a8ef9663657488dc705c32cdef791dae78574152 SHA-256: 3b152409ed0a80d7dcb74b02584cbef6b429aa92e3066b877c271ee9e2d4e1dd
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to various domains, many of which appear to be disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains a deceptive title related to 'criminal law in Canada' which is likely a lure to encourage users to click on the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dugedepap.ru/123?utm_term=what+is+criminal+law+in+canada PDF link annotation
    • http://mishabelle.ru/85541967655mfmb3.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/biganagutog.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/32438421502.pdfIn PDF document text
    • https://xuzelete.weebly.com/uploads/1/3/2/6/132681171/2606723.pdfIn PDF document text
    • http://1freedom.space/tidaxefewuwoduvopegusexi7ovwb.pdfIn PDF document text
    • http://zikewexer.scienceontheweb.net/elite_platinum_maxi_matic_pressure_cooker_instructions.pdfIn PDF document text
    • https://junanopawakeza.weebly.com/uploads/1/3/3/9/133999625/tatugamiforesilu.pdfIn PDF document text
    • http://datinge.site/funciones_trigonometricas_para_angulos_doblesp5vlz.pdfIn PDF document text
    • https://woxopipuwesubaj.weebly.com/uploads/1/3/1/4/131453061/goduso.pdfIn PDF document text
    • https://rogujodur.weebly.com/uploads/1/3/4/8/134899240/somaxupagovevogefa.pdfIn PDF document text
    • http://rumudasejozekes.iblogger.org/riremufuwonerener.pdfIn PDF document text
    • http://boomua.site/wirojamuwim8gya.pdfIn PDF document text
    • https://ruxebawinafa.weebly.com/uploads/1/3/0/7/130776533/4641509.pdfIn PDF document text
    • https://wofugegiperezaj.weebly.com/uploads/1/3/4/5/134528457/7406823.pdfIn PDF document text
    • https://nuzivepumug.weebly.com/uploads/1/3/1/3/131379706/ruderaso_bepakakak_kerosoz_kolawuvefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392862/normal_5fd37cd209bd4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nizowozutagele.atwebpages.com/96533783038.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_off00012072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12072 5284 bytes
SHA-256: 439395e2ce2c9562056701b945f0201900cd33d5ffe958270415adc491a716d6
font_01_sfnt_off00013252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13252 11180 bytes
SHA-256: 0522da2e15035451a5bb700d63fd7fde7653f01b99b2c30cb94140f70653abb6

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