Malicious PDF — malware analysis report

Static analysis result for SHA-256 50abf1628775e4a0…

MALICIOUS

PDF

88.1 KB Created: 2021-02-17 21:27:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 434dd105905be3067d2bc46a0bd9b191 SHA-1: 24d1dd4387811e714046c019b1d0ffcbd4926472 SHA-256: 50abf1628775e4a0aada50bed644e32b9d8a8968ab409c43c8e8b3552e13ce01
136 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URL pointing to a potential phishing or malware distribution site. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests the document may be instructing the user to open a password-protected archive, a common tactic to evade gateway scanning. ClamAV detection further confirms its malicious nature, identifying it as 'Pdf.Phishing.Trojan'. No scripts were extracted, but the presence of external URIs and the overall detection pattern indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://bologen.ru/strik?utm_term=ways+to+prevent+cyberbullying+essay PDF link annotation
    • http://lemovifi.iblogger.org/bamejoxoxemigazekuboru.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fd11b80347de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369491/normal_6022bb9e8b2d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420766/normal_602d0998e7c46.pdfIn PDF document text
    • http://tufevasataj.iblogger.org/invasive_group_a_strep_treatment_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451555/normal_60010399d4f8d.pdfIn PDF document text
    • http://pukotuv.22web.org/89639181060.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jopokodex.rf.gd/losogajulerosonewusipet.pdfIn PDF document text
    • http://levewome.epizy.com/vokebodur.pdfIn PDF document text
    • http://muvalinifotu.rf.gd/chopin_script_font_free_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/bidemewufa/68771963781.pdfIn PDF document text
    • http://lipojutezudu.rf.gd/fasamubap.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/cell_structure_and_function_quiz.pdfIn PDF document text
    • http://pimubejat.epizy.com/68612301905.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/99646010360.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/android_auto_update_release_date_canada.pdfIn PDF document text
    • http://fizoluzakazuxaw.rf.gd/92362001093.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/53199490314.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/mera_bhola_bhandari_ringtone_karen.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/nusirexo.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_off00011afd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AFD 5416 bytes
SHA-256: 5e19e7facd39eb87875895373ee3371e5369d5cc8cc1776660d5c117ae7ae746
font_01_sfnt_off00012d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D93 10936 bytes
SHA-256: 223a5e7a0cccfba63f1a3388b160cac8e6c0a3f01232829e084790abf27eebac

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