Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2d72f5e589a52bb…

MALICIOUS

PDF

78.7 KB Created: 2021-03-02 21:23:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1b4870f70e85d9bce796607353ed2c39 SHA-1: 899042a1ed73db339518c1adefd1e31dea328342 SHA-256: d2d72f5e589a52bb790237214dbaba5352166d22e0ecd036a1302b022dcd6448
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that lead to potentially malicious content, masquerading as exam questions. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs suggests the document is designed to redirect the user to a compromised or malicious site for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://midufefew.ru/award?keyword=exam+questions+and+answers+entrepreneurship PDF link annotation
    • https://zabosete.weebly.com/uploads/1/3/1/1/131164473/gekubasukavev_ribobumibujaga_disitodute_kuzewe.pdfIn PDF document text
    • http://flowerport.market/life_goes_on_quotes_tupacddn54.pdfIn PDF document text
    • http://free-at.pro/arduino_lm358_op_amp_pwm_to_voltage_converter9cm14.pdfIn PDF document text
    • http://lizowaw.scienceontheweb.net/dds_place_8324_s_kedzie_ave_chicago_il_60652.pdfIn PDF document text
    • http://vulufinagi.mypressonline.com/alone_together_fall_out_boy_remix.pdfIn PDF document text
    • http://lajulufubugo.22web.org/dizubelumexorotepof.pdfIn PDF document text
    • http://kuxapiwi.22web.org/immunology_made_ridiculously_simple_reddit.pdfIn PDF document text
    • https://xevivipemasap.weebly.com/uploads/1/3/4/4/134481894/1318112.pdfIn PDF document text
    • https://fabisinutufonos.weebly.com/uploads/1/3/5/9/135993578/difivetakekabir-vofewaguget.pdfIn PDF document text
    • http://usmileofficial.site/dowepikck1uf.pdfIn PDF document text
    • http://importants.space/verbals_review_worksheetuyowr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/rebesudanolo/51686033345.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/amt_fr_informationsverarbeitung_kln.pdfIn PDF document text
    • http://lutolajawaw.rf.gd/98929203995.pdfIn PDF document text
    • http://jitawidavez.atwebpages.com/grokking_deep_learning_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/medscape_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/nufagiwijupa.pdfIn PDF document text
    • http://moxutomib.rf.gd/whats_chaos_theory.pdfIn PDF document text
    • http://renirujetumofid.epizy.com/tebefigutaduvozodok.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 5292 bytes
SHA-256: 4ad89f320fd8c3ff1cb0381134c908001628b12e849e09f1cb93e7b9a1c63b30
font_01_sfnt_off0000faef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEF 10620 bytes
SHA-256: 7ad8a716b5c7412861b4968663b352d6e169e1221c18dd5b77893514cd4035db
font_02_sfnt_off00011f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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