Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27c7bc11fb521ae…

MALICIOUS

PDF

237.1 KB Created: 2021-03-06 23:25:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 5aacbb41473421ccd92ea9f2e59405ba SHA-1: 08b86c73f4e79d5c999cea4c6dd8d57547bb8d25 SHA-256: f27c7bc11fb521aed27a58d8dc139bcd700fb3b469fe95916bccb195136b6151
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains an embedded URI that directs users to a suspicious domain, likely for credential harvesting or malware delivery. Although no scripts were explicitly extracted, the presence of embedded URIs and the nature of the detection suggest an attempt to exploit users through social engineering, likely as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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://druttle.ru/award?keyword=in+the+first+phase+of+the+industrial+revolution+lsat PDF link annotation
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/3999678.pdfIn PDF document text
    • http://jushq.pro/blank_calendar_june_2018ix2v7.pdfIn PDF document text
    • http://xenuponominabek.iblogger.org/does_sword_art_online_have_a_season_3.pdfIn PDF document text
    • https://woxupixukuxosi.weebly.com/uploads/1/3/5/3/135316012/zakuvixuzaduv_wusabebogijakol_wopefusurevol.pdfIn PDF document text
    • https://turoliletipusu.weebly.com/uploads/1/3/5/9/135969349/79d951bfc9.pdfIn PDF document text
    • http://porafav.iblogger.org/sarin.pdfIn PDF document text
    • http://gejesixave.scienceontheweb.net/stairway_to_heaven_bass_guitar_pro_tab.pdfIn PDF document text
    • https://revugegan.weebly.com/uploads/1/3/4/6/134682990/lerevazubofobemu.pdfIn PDF document text
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/pogifot-fopedabedunemu.pdfIn PDF document text
    • https://mabudorowux.weebly.com/uploads/1/3/4/4/134458492/0a24a17c.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/introduction_to_ecological_biochemistryqzl48.pdfIn PDF document text
    • http://pochta-24.cc/jofupajowali3opw6.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/reptile_and_amphibian_study_merit_badge_answers.pdfIn PDF document text
    • https://segurabo.weebly.com/uploads/1/3/5/9/135964373/sigomesuxevoxod.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vomitad.epizy.com/temptalia_foundation_matrix_spreadsheet.pdfIn PDF document text
    • https://e26976e3-f089-44cc-a2a6-54bcc6cae308.filesusr.com/ugd/0df15e_2cde52152eff4fbd8d2411d480c175d4.pdf?index=trueIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_e01b430f9dd144f6ac761ea44900a771.pdf?index=trueIn PDF document text
    • https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_9b1580bbcfd6422a9254e2c049167cf9.pdf?index=trueIn PDF document text
    • http://wolobugoxew.myartsonline.com/how_to_play_dd_for_beginners.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_off00036c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36C6D 5124 bytes
SHA-256: fb1da358d3bbf889b3cce13eb1ec47b5b09650260179f4f6def8d679aa4af5ee
font_01_sfnt_off00037ddd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37DDD 11376 bytes
SHA-256: 6f2f0843ceec4ac0d81c36458b1d05da9e9650b1dbed7f5fac0b4ae7c894de2a

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