Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1d723ab3956cb06…

MALICIOUS

PDF

70.5 KB Created: 2021-02-25 20:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 00e4a7a879e365eda126c3ef517ff9ed SHA-1: 5b34d29835289ddb03336e393e86102dc99bb382 SHA-256: e1d723ab3956cb069d04e43f68754e4a0842f3663dcfa8427fb82759c6e59f42
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 'https://yafferge.ru/123?utm_term=walls+of+limerick'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious, supporting the phishing or redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://yafferge.ru/123?utm_term=walls+of+limerick In PDF document text
    • http://riforemepenog.iblogger.org/traffic_report_on_m1_southbound.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/Gwgh0gA/jafagubolulokogu.pdfIn PDF document text
    • https://buxudirikebipur.weebly.com/uploads/1/3/1/1/131164004/ddac9c251.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/menopapasulanugiwofasere.pdfIn PDF document text
    • http://penageli.getenjoyment.net/what_does_god_say_about_the_storm.pdfIn PDF document text
    • http://sugamipilafo.iblogger.org/tobekuzunifus.pdfIn PDF document text
    • http://pawusofadezozep.22web.org/81250555465.pdfIn PDF document text
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/8669769.pdfIn PDF document text
    • https://cdn.sqhk.co/lilodipu/jb4Ljay/43244515326.pdfIn PDF document text
    • https://cdn.sqhk.co/mojuzizimu/CYLge3i/norul.pdfIn PDF document text
    • https://jotovaxawunujej.weebly.com/uploads/1/3/1/8/131856347/a4f4cc67f58fb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kokibitumoxa.epizy.com/49209937457.pdfIn PDF document text
    • http://novoboninixeme.epizy.com/80415516660.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/duxizadenatetad.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/75296229156.pdfIn PDF document text
    • http://wefugugis.epizy.com/large_gala_apple_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/73363012335.pdfIn PDF document text
    • http://vonupov.epizy.com/18931935642.pdfIn PDF document text
    • https://s3.amazonaws.com/timeziso/good_clinical_practice_in_research_guidelines.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_off0000d7e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E8 5104 bytes
SHA-256: 3319fe9d6bf208352615a03efdc9f26b0cfcd021e7fbfcdd6408ac4d1f255bc3
font_01_sfnt_off0000e941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE941 10584 bytes
SHA-256: 0ec670b5615c34cb17957bf33eae600c2cf3009884e498df6263df95acdb8990

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