Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2399bb271c4146…

MALICIOUS

PDF

83.0 KB Created: 2021-02-25 09:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 81f3f0a979170d25a2fcfc623c0c05e1 SHA-1: 4e43e7602d55413b8efaa6fa9dd58c2511821b90 SHA-256: 6d2399bb271c41465231ff0846b6e3fd1787fdd07d01e79fcce6f691a3cd5414
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'crophysi.ru'. Additionally, ClamAV detected the file as 'Pdf.Phishing.Trojan'. The embedded URLs suggest a phishing or malware distribution attempt, likely using a social engineering lure disguised as a document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=did+artemis+and+apollo+get+along In PDF document text
    • http://bionatur.space/kutuzijojulijumlxpac.pdfIn PDF document text
    • http://tenegijo.iblogger.org/63599687987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_602228412a3d4.pdfIn PDF document text
    • http://hookup158.fun/biographical_dictionary_of_christian_missionswf5im.pdfIn PDF document text
    • http://nickned.me/28330463494nodfm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kimone/breast_cancer_fact_sheet_2018.pdfIn PDF document text
    • http://xafamikipu.epizy.com/how_to_write_a_convincing_conclusion.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/buxisapesobifufodofaj.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/internet_speed_test_meter.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/faroxelesaneporof.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/kagujafajezawujiterepoguk.pdfIn PDF document text
    • https://s3.amazonaws.com/jobavo/23096838676.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/bromate_formation_water_treatment.pdfIn PDF document text
    • http://lusafawapinoxe.rf.gd/microbiology_lab_equipment.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_off0000e6b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B4 2972 bytes
SHA-256: db216172449f862b8dde07a1ae4465b1380633be226bb972194f8bb86fc18425
font_01_sfnt_off0000f138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF138 5280 bytes
SHA-256: b8531ceb086a4038b72bbd3153fe868e2a25d1ca177857b2f86b216dfbfc624d
font_02_sfnt_off0001031a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031A 11668 bytes
SHA-256: fc707617c7c8d62d779405da4886380db950af48f439c8089b6a899e48f9352b
font_03_sfnt_off000128ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EC 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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