Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8af86b319dafc71…

MALICIOUS

PDF

75.2 KB Created: 2021-03-10 16:38:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fc907d9a0026b4eafb296c8a75ccdbc6 SHA-1: d835c6b134f015c739130b7a2bb1d13e79d8c6c5 SHA-256: a8af86b319dafc71e4921897edcb3b9e520f0b5de4327ffb2d69b72f7da3b57f
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with a primary focus on 'fokemale.ru', suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, reinforcing the malicious intent. ClamAV detection as 'Pdf.Phishing.Trojan' further confirms its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/wix?keyword=rosario+dela+preciosa+sangre+de+jesucristo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386074/normal_60236833ab3f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480382/normal_603113a17fb09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385869/normal_5fe3104f0a49b.pdfIn PDF document text
    • http://xamurewezoviw.iblogger.org/vidikodubowedojurejejuku.pdfIn PDF document text
    • http://mufutekuson.getenjoyment.net/rca_juno_10_pro_10.1_tablet_-_16_gb_black_review.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489428/normal_5ffd289c39d58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459636/normal_5ffe430993241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414501/normal_5fd87b539837a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392195/normal_6023d5cc2a215.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427793/normal_5fe08c3094494.pdfIn PDF document text
    • http://xezifimo.iblogger.org/barn_burning_summary_murakami.pdfIn PDF document text
    • http://nitesufi.sportsontheweb.net/how_to_pair_jam_hang_up_bluetooth_speaker.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419857/normal_600a4b2fde0ab.pdfIn PDF document text
    • http://jaxifas.getenjoyment.net/repolevofelojefigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24d1f61b-f5c5-4d2f-8180-62589f44e8d8.filesusr.com/ugd/eed56f_979a06a2900b49f095a126c9f1288bbc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/cisco_ccna_certification_exam_questions.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/system_data_sqlite_dll_64_bit.pdfIn PDF document text
    • https://dab7fb03-f2af-4a8e-9cb9-31de623bedb3.filesusr.com/ugd/58b596_25b597bf0d044b25bf44228e50080805.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gurupixabogivaz/59864139541.pdfIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/18085904388.pdfIn PDF document text
    • https://06ebba1c-c738-45d4-b58d-83edbdcc9420.filesusr.com/ugd/b14caa_6a9890e473f6405680c04aa95a624ed6.pdf?index=trueIn PDF document text
    • http://pidawuz.epizy.com/financial_statement_analysis_internship_report.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/92831469577.pdfIn PDF document text
    • http://repuvamiperubo.epizy.com/gimopofetadoned.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_off0000e624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE624 5324 bytes
SHA-256: d8ed709798206fe0ebef47cec770369702808725743977ab5790039ca1ecaf8e
font_01_sfnt_off0000f856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF856 11348 bytes
SHA-256: 5411a223b45fc64de7ea4b4fc9cc79a6f8f3b2104ca638968bb3fd109cc41da5

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