Malicious PDF — malware analysis report

Static analysis result for SHA-256 6136fe7dfa4fefbc…

MALICIOUS

PDF

73.1 KB Created: 2021-04-26 02:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5a568dc48c7f97f63623090d642ee910 SHA-1: 5bd5f7dde5e3b2e445655b6a73dfff0edc228060 SHA-256: 6136fe7dfa4fefbc12f6e5a58225117c0133901fb4df4d21f31fdbb921b520df
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that leads to a suspicious domain, likely intended to host a phishing page or a second-stage payload. The document body, though heavily obfuscated, contains keywords related to appliance error codes, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/strik?utm_term=thermador+oven+error+code+e6100 PDF link annotation
    • https://cdn.sqhk.co/madufuxenuw/zflPjco/ninjas_vs_zombies_3_ps4.pdfIn PDF document text
    • https://cdn.sqhk.co/zalenemu/qUFQgih/52056930946.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/haIhedr/furasedilo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465397/normal_5fc9a4217638a.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/hd8pif5/wingsuit_flight_death.pdfIn PDF document text
    • https://cdn.sqhk.co/juselivo/hdGjbA3/33727110078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392472/normal_5ff6710b4928e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406776/normal_6058d12e7a8ec.pdfIn PDF document text
    • http://zumepaposakuf.scienceontheweb.net/calendario_anual_2020_argentina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444095/normal_605c8dd64a246.pdfIn PDF document text
    • https://cdn.sqhk.co/kofisosiz/jjbiije/movie_wallpapers_for_iphone_xs_4k.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/vojudo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2634a4ee-729a-4c44-ae32-1319d756df24/que_significa_arco_iris_en_la_biblia.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/enron_the_smartest_guys_in_the_room_movie_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/574cb1d2-ee46-45cc-9f97-2883fbb03e83/secretary_interview_questions_and_answers_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/vunizi/surov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14ad31da-548b-4c91-87f3-deb744af1b30/engineering_vibration_4th_edition_solution.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec55c08f-919a-4d6f-8d60-7de79b648db5/how_to_connect_my_ipad_to_a_canon_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/rejiner/25136365881.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/job_announcement_template_word.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_off0000e1e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E4 5328 bytes
SHA-256: 91ad2f9aefa3814eebd6de59930ff4f203608b3d32649d8a5d89376e3d05dbbe
font_01_sfnt_off0000f3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DC 10292 bytes
SHA-256: ef2a679b81590e0f828c53e59e8fc34f86d4fe635492179a3885c1aa738feac4

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