Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e5bbbf5531e3ef2…

MALICIOUS

PDF

80.2 KB Created: 2021-03-18 10:41:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6fc53d3f3e68b4a1581a284a94c5f763 SHA-1: 8b354e58fb67c1459bd32594ea41781eaa7cafe2 SHA-256: 5e5bbbf5531e3ef2bb8e766a3de862e5bfa4d8659f84d180ec14a13a4db3ac58
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a 'Pdf.Phishing.Trojan'. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/award?keyword=weather+map+symbols+pdf
    • http://ita-bio.fun/on_the_genealogy_of_morality_page_countzt78a.pdf
    • http://nemosixumeki.mypressonline.com/article_about_educational_technology_in_the_philippines.pdf
    • http://tevfikyuce.xyz/where_was_the_25th_anniversary_of_les_miserables_performeduwpuy.pdf
    • http://rolapisi.scienceontheweb.net/capsim_for_dummies_2020.pdf
    • http://7gusevshop.website/laney_supergroup_schematicde626.pdf
    • http://questotzvezd.space/mujiwabmta9b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/48770037-db5d-49f7-8091-97c50cf2aab9/how_to_sync_sandisk_sansa_mp3_player.pdf
    • http://benamow.myartsonline.com/gubag.pdf
    • https://uploads.strikinglycdn.com/files/ce9d9afd-3973-4f47-bfb5-72c2414c70ff/orlando_virginia_woolf_film_online.pdf
    • https://uploads.strikinglycdn.com/files/28211d8d-2244-475e-adf3-ad4017d7d2e3/dias_festivos_en_enero_2020_mexico.pdf
    • https://uploads.strikinglycdn.com/files/949eb0d7-db13-4dec-9a27-50f245f2e7e9/amoeba_sisters_introduction_to_cells_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/74766f96-a50f-4244-a3a6-8329f22681c7/12026932894.pdf
    • https://s3.amazonaws.com/rexogeguxosix/85043600481.pdf
    • https://uploads.strikinglycdn.com/files/f97d35bb-07f9-4904-96d8-ae4294cd4194/247_ez_loan_reviews.pdf
    • https://uploads.strikinglycdn.com/files/40565a43-e0d1-4b5a-83ff-3ca1f566975d/62914310750.pdf
    • https://uploads.strikinglycdn.com/files/322ee6fa-706d-4380-ac7c-772fe1e04c31/what_are_the_advantages_and_disadvantages_of_the_richter_scale.pdf
    • http://neloralo.myartsonline.com/25934275499.pdf
    • https://s3.amazonaws.com/xalasawu/krfc302ess_dimension_guide.pdf
    • https://uploads.strikinglycdn.com/files/9c4551ee-dd41-46e2-a2d0-acda96174106/sizotewise.pdf
    • https://s3.amazonaws.com/wupiwupiwot/behavior_theory_in_health_promotion_practice_and_research_free.pdf
    • https://uploads.strikinglycdn.com/files/bdf1e41c-d1f1-4ce5-89f0-b7d859090af2/it_would_be_nice_synonym.pdf
    • https://uploads.strikinglycdn.com/files/28175ce0-f84f-4427-bff0-5ce9bd664231/pioneer_avh-p4400bh_firmware_update.pdf
    • https://uploads.strikinglycdn.com/files/44f28e4d-56f3-426b-b1b3-ee8ad01ab3ba/93296895634.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_off0000fbef.bin
54db07309df11aa207fcb739dcd4923b2a16983abd45028ee9c21a575c5fca59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEF 5536 bytes
font_01_sfnt_off00010ea2.bin
911b6d7abcde17d551b19c985b22236b3549c68a42fa743fa6743ff6988d693b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA2 10912 bytes

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