Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1d236b3b3bbfc09…

MALICIOUS

PDF

69.5 KB Created: 2021-03-15 02:23:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6919b0bd58ad753d1678c069aa81465 SHA-1: c45272a7dc1511f44850435f6423c3dde3960302 SHA-256: a1d236b3b3bbfc096aaa31a4e542112be7b733234ab6fe922e88ae44d84fa089
124 Risk Score

Malware Insights

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

The PDF contains embedded URLs that point to potentially malicious domains, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'ML_NYX_PDF_MALICIOUS' heuristics. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. The document body, though heavily obfuscated, suggests a lure related to a "chromaticity diagram pdf" to direct users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9662

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
  • 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
  • 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://druttle.ru/award?keyword=cie+1931+chromaticity+diagram+pdf
    • http://worozoxiw.sportsontheweb.net/bozokameruti.pdf
    • http://goods-amzon.com/rakeselosol1vrbl.pdf
    • http://vodabutopidaru.getenjoyment.net/sirelowesuta.pdf
    • http://iranomics.com/apple_iphone_5c_batteryhhaw8.pdf
    • http://secureappeal.com/how_much_do_wilderness_first_responders_makeehik9.pdf
    • http://lagevozawo.iblogger.org/presentation_skills_in_english.pdf
    • http://paxijivatebul.getenjoyment.net/four_letter_words_in_english_for_kindergarten.pdf
    • http://bedetomime.22web.org/encuesta_nacional_de_calidad_de_vida_2020.pdf
    • http://getdouche.xyz/10th_class_maths_textbook_english_medium_downloadnl8nu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5f5116d5-302e-4dba-a5a5-363aeac910a1/fetujegafaduvemopu.pdf
    • http://fopekexu.epizy.com/arista_2._0_light_font.pdf
    • http://pasifowon.atwebpages.com/89834746833.pdf
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_7db73dd727eb4895883a6141b5753eed.pdf?index=true
    • http://zevusup.atwebpages.com/how_to_calculate_compound_interest_over_time_in_excel.pdf
    • http://devawuwu.rf.gd/43533252056.pdf
    • http://zojimako.rf.gd/jazesoxapalalafizojame.pdf
    • https://uploads.strikinglycdn.com/files/4ee40a04-eb47-4100-a7cd-8d7f6355fd9f/89138097312.pdf
    • https://170a7d3c-74f0-42f5-9ead-98ae292a4922.filesusr.com/ugd/a18aa6_a30339a4f0464457b370916c3fcec18c.pdf?index=true
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_3791c38dc6bd4a04b071554e996ff97c.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb73.bin
8946314709148deee7ee0f4691581a734a6198c802e71dbf2449ff79e870f27e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB73 5740 bytes

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