Malicious PDF — malware analysis report

Static analysis result for SHA-256 a33f0dbe74d14fda…

MALICIOUS

PDF

66.4 KB Created: 2021-02-01 20:29:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 59d2bff9dfb4161e30a06f8c94216e20 SHA-1: e38b3bf42bda4faee38056dbb0321d112e8f77f5 SHA-256: a33f0dbe74d14fda3c8d7431f8a0c41f41a44cf91d9508919ec16622ee284f9b
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document identified as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'https://bologen.ru/123?utm_term=filme+online+gratis+traduse', which is likely a phishing lure. The document body, though heavily obfuscated, suggests a theme related to online movies, reinforcing the phishing pretext. No scripts were extracted, but the presence of external URIs and the overall classification indicate a phishing attempt.

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://bologen.ru/123?utm_term=filme+online+gratis+traduse PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4481420/normal_60052a335901e.pdfIn PDF document text
    • https://cdn.sqhk.co/raxuzuvuluf/jgogdGW/dropwizard_vs_spring_boot_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419412/normal_5feeb95bf2b4b.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/9fpzhbt/nimuretiwavonunexitoked.pdfIn PDF document text
    • https://cdn.sqhk.co/wejupexuput/9vhaidc/zombie_fortress_evolution_ice_age_walkthrough.pdfIn PDF document text
    • https://cdn.sqhk.co/rowubuvuke/luhfpqM/best_offline_bollywood_music_app_for_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/RvhmheK/losung_puzzle_box_level_58.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444386/normal_5ff58c0b281f7.pdfIn PDF document text
    • http://tuxosuzarug.iblogger.org/record_player_scratch_sound_effect_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499285/normal_60159cd914a02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369160/normal_5ff764cd93ac2.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/ijibthO/19647934949.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/iNxidE9/gomevezaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/XLIhczl/find_words_for_realty.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/gfhehfJ/raxibater.pdfIn PDF document text
    • https://cdn.sqhk.co/jagugide/ggjaifN/56949768907.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413713/normal_5fd3d0d367741.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://babokad.epizy.com/proprietary_company_asic_reporting.pdfIn PDF document text
    • http://garapaf.epizy.com/54347780382.pdfIn PDF document text
    • http://sibijexobesu.epizy.com/personal_development_plan_ppt_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC71D 5100 bytes
SHA-256: 8997ae1511b443cf0599cfe6b55ce1dcb0a5fbd374fdfe59cb8d08258d4bb7dd
font_01_sfnt_off0000d85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85D 11384 bytes
SHA-256: 023261da959319629b185ea75ce54b65760dd7529735a1541a21d3c1463d9372

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