Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c6b2fd86622f8c…

MALICIOUS

PDF

77.8 KB Created: 2021-02-15 07:58:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 337abe472c3600e21e9de91f02c1fd42 SHA-1: 7100628940d9cfe218e7ca87b33b9b48fcec7886 SHA-256: 78c6b2fd86622f8c14e5a137b8a46aa5785f4ac6445bed0cc3ca036cc40a24b5
136 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, with heuristics indicating it's a phishing lure for a password-protected archive. The embedded URL, https://baarspo.ru/123?utm_term=pokeland+legends+hack+apk+download, is highly suspicious and likely serves as a download link for a second-stage payload. The document body, though partially corrupted, contains keywords related to "hack apk download", reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/123?utm_term=pokeland+legends+hack+apk+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4472486/normal_6023e51a5b731.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/tokit/lasting_power_of_attorney_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/falejogajir/payzapp_apk_file.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/debilikolupa.pdfIn PDF document text
    • https://s3.amazonaws.com/rupatojuko/battle_chasers_nightwar_hunt_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/free_printer_brother_dcp-_t310.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/samsung_j730f_ds_firmware.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/the_integumentary_system_crossword_puzzle_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/bazelixizarafikelu.pdfIn PDF document text
    • https://s3.amazonaws.com/zafirawit/kali_linux_nethunter_android_tutorial.pdfIn PDF document text
    • http://kimanaw.epizy.com/subacromial_bursitis_patient_information.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/29329101615.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/60186277155.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/apache_camel_core_jar.pdfIn PDF document text
    • http://liboditi.rf.gd/endnote_apa_template.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_off0000e704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 5056 bytes
SHA-256: 3006b7ef5afaff07302dabcb6bf5960c5542cbb8f4d59b7a43e3e9245a1d5f58
font_01_sfnt_off0000f83d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83D 10620 bytes
SHA-256: 04b822a37dedad614ea6c95c68cf4669161dfd98c37c594d90a715eadb6155d3
font_02_sfnt_off00011c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5C 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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