Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fb139a39038bf5…

MALICIOUS

PDF

87.4 KB Created: 2021-03-31 03:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3ba06c7f805839ed9b54416f5ce67d5 SHA-1: 1f94809a2d0a8633b5c6c3c14ebf4d3fc5387e9b SHA-256: 68fb139a39038bf547be8134e0c9f6fc37882fb81952973ecf7aa34b2e803d85
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'golowaki.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a spearphishing attachment designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/award?keyword=biodata+resume+format+pdf+download
    • http://nujatofu.22web.org/flir_one_pro_android_amazon.pdf
    • http://gopubewigofopa.iblogger.org/46438787346.pdf
    • http://maletewidulebil.iblogger.org/500_writing_prompts_author.pdf
    • http://lasns.fun/45678980440h6wqa.pdf
    • http://medesutaduj.22web.org/smart_tv_android_sony_49.pdf
    • http://eagleaff.com/born_this_way_lyrics5xhrf.pdf
    • http://copyright-help-report.com/2014_ford_explorer_workshop_manuals6n1l.pdf
    • http://reduslim-officialsite.site/tintin_books_seriesj4eoi.pdf
    • http://hookup681.site/5002208312f3of2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bd213cd4-abfb-41db-a1bb-1aaf1c5c02fe/76306386635.pdf
    • http://zalowakudedakov.rf.gd/analytical_reasoning_book.pdf
    • http://beritoka.rf.gd/24731036036.pdf
    • https://uploads.strikinglycdn.com/files/837034be-2b41-43aa-9dde-f4c8aafab6f7/20580955811.pdf
    • https://s3.amazonaws.com/mijumomub/modisuxexejogumupetenu.pdf
    • https://s3.amazonaws.com/desekusoxi/canon_eos_rebel_t6i_dslr_camera_manual.pdf
    • http://tulinavosubod.rf.gd/1006647407.pdf
    • https://s3.amazonaws.com/sajatofubote/75550496626.pdf
    • https://uploads.strikinglycdn.com/files/fae9a656-cdfc-469e-a588-ccca9d4168fd/fundamentals_of_digital_logic_with_verilog_design_solutions.pdf
    • https://s3.amazonaws.com/jubiferekaka/tumble_dryer_temperature_guide.pdf
    • https://uploads.strikinglycdn.com/files/749ba3b5-eb9a-4dd1-a57e-31be43bd6dac/calvin_and_hobbes_complete_collection.pdf
    • https://s3.amazonaws.com/wovigebi/duzulukijegusuvixigaparo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001160f.bin
da7c2f43863e7558df8e45b675b058468c9c1a1a79e72c43dc22c97cd8a292d1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1160F 5328 bytes
font_01_sfnt_off0001282c.bin
497e06b8d4dc15e875dcbf0a62cbf389402ad0a1beaf966cd55949bb35a31087
pdf-font-stream PDF embedded font (sfnt) at offset 0x1282C 11132 bytes