Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90db1e1c9ed761e…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 14:53:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6317696b4aa58e8e50d333924f30a18b SHA-1: b61e8d8675d836130a57b16fc60cb06f516d9c77 SHA-256: e90db1e1c9ed761e8dba416a3311ba364dedc9a04cc1146755310f88991332a0
104 Risk Score

Malware Insights

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

The PDF contains an embedded URL that redirects to a driver download page, indicated by the 'PDF_URI' heuristic and the 'ML_NYX_PDF_MALICIOUS' flag. ClamAV also detected this file as 'Pdf.Phishing.Trojan'. The presence of a 'SE_DOWNLOAD_BUTTON' heuristic further suggests a phishing or social engineering attempt to trick the user into downloading potentially malicious software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mezovuduw.ru/aws?utm_term=driver+wifi+acer+aspire+one+722+windows+7+64+bit
    • http://fomuvegikutidob.iblogger.org/10_interesting_facts_about_alexander_the_great.pdf
    • http://guwelozi.iblogger.org/pobugike.pdf
    • http://bajemafo.iblogger.org/transformers_animals_beast_wars_characters.pdf
    • https://papuxivosep.weebly.com/uploads/1/3/4/4/134491017/4a588.pdf
    • https://kafiwixuvaso.weebly.com/uploads/1/3/0/8/130874495/932088.pdf
    • https://dokegofixak.weebly.com/uploads/1/3/0/8/130873830/bekajivitutiburiv.pdf
    • https://zipibolusoxa.weebly.com/uploads/1/3/4/6/134627603/8684205.pdf
    • https://xajixaze.weebly.com/uploads/1/3/2/3/132302973/d64793.pdf
    • http://gifozuxozud.22web.org/answering_legal_indeed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rebomedug/74992714884.pdf
    • https://uploads.strikinglycdn.com/files/f70bb7ac-9829-44d8-a32c-fcb1b14bcab4/bevegojobibetaza.pdf
    • https://uploads.strikinglycdn.com/files/cd50f5d8-d3df-4891-be4e-9a3028afcced/jj_smith_books.pdf
    • https://uploads.strikinglycdn.com/files/6e6eff12-b00d-43d5-a695-e890c1e3c502/uk_and_american_spelling_differences.pdf
    • http://lubozudaxik.epizy.com/bar_pirata_bus_formentera.pdf
    • https://uploads.strikinglycdn.com/files/4899f54d-486d-4858-8518-076bcced7a13/name_that_angle_pair_worksheet_answers_all_things_algebra.pdf
    • https://uploads.strikinglycdn.com/files/bf325b95-c947-4ea8-8c5c-7412cf16e3c3/final_fantasy_xiii-2_monster_capture_guide.pdf
    • https://uploads.strikinglycdn.com/files/dab42b9a-cbf7-4d88-8552-1df1639459bc/what_is_class_certification_discovery.pdf
    • http://wazinupizut.epizy.com/free_andy_os_offline_installer.pdf
    • https://s3.amazonaws.com/lezopobigeza/21208971392.pdf
    • http://nipofoxi.epizy.com/2007_cadillac_srx_owners_manual.pdf
    • https://uploads.strikinglycdn.com/files/d3e6c7f4-b80c-41b8-9fd6-48f8f22eb62e/how_to_repair_washing_machine_gearbox.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_off0000ef8a.bin
83e31b93a8a5b3fe422295df63c4588c3e699135865d5a7b6d936fdf1ad42b2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8A 5864 bytes
font_01_sfnt_off000103b1.bin
e6c91ce9be54fb9aa6e837fe34cb237ce8b2d798351040781548a118d31d1b97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B1 10680 bytes

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