Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9cef30ec58e2f3…

MALICIOUS

PDF

87.1 KB Created: 2021-03-28 14:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ac7cc1fc780a887c4a75b1ec1ddfb04 SHA-1: 7989539a3c185c1aa1f3b942f04e47eafa1dc021 SHA-256: 2e9cef30ec58e2f3fc24a4f54d4f70112a2f74f2aba41ebe6152a5605d7516e1
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'resalured.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, suggests a lure related to 'medical bacteriology', aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://resalured.ru/award?keyword=introduction+to+medical+bacteriology+pdf
    • http://webmastervlad.ru/wordly_wise_3000_book_8_lesson_4_part_e6wpt5.pdf
    • http://waduvirizozagas.iblogger.org/what_is_a_bug_computer_lingo.pdf
    • http://leaninrzpd.site/how_much_does_entry_level_it_job_pay9rlgc.pdf
    • http://gogosesetuver.22web.org/67500131339.pdf
    • http://smartycredit.info/67806132160a2yft.pdf
    • http://scarcebook.com/68193229567w8in2.pdf
    • http://meetchat.space/66712807612uxz7u.pdf
    • http://trelon.fun/sword_art_online_fatal_bullet_full_gameplayuc5v2.pdf
    • http://qlemelest.online/ler_nana_manga_on-line_espanholtx8j0.pdf
    • http://car-den.ru/27539590670bct41.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/913bcac6-846d-4647-9e7a-f307f67828a4/55369328032.pdf
    • https://s3.amazonaws.com/mekonulegipero/android_ndk_vs_sdk.pdf
    • https://uploads.strikinglycdn.com/files/948db44c-4794-4b3f-9492-10c6b726a605/what_is_the_message_of_the_tempest.pdf
    • http://teruwisap.epizy.com/airbnb_style_guide.pdf
    • https://uploads.strikinglycdn.com/files/c4a4fb15-0e78-4f5e-99d5-138cb617c669/gefowubesovev.pdf
    • https://uploads.strikinglycdn.com/files/5d23004f-8064-41a6-aab8-3ddaacd27067/boy_scout_wreaths_2020_mn.pdf
    • https://uploads.strikinglycdn.com/files/ea3f4177-9ba1-4070-a9cd-252aa06dc1d5/timenemomubokefimiwased.pdf
    • https://uploads.strikinglycdn.com/files/31641fe4-e071-4246-82ab-0bce8e1676ee/what_sign_are_you_if_your_birthday_is_february_16.pdf
    • https://s3.amazonaws.com/pesetufavo/47186209360.pdf
    • https://s3.amazonaws.com/dazifozixawus/18229538322.pdf
    • https://uploads.strikinglycdn.com/files/3470c4f1-1944-48fd-bac4-100bcb36a9c3/theory_of_relativity_meaning_in_bengali.pdf
    • https://uploads.strikinglycdn.com/files/bb3ef7af-cda4-4f1f-82c6-1debae400610/fetiwurebugidirini.pdf
    • https://s3.amazonaws.com/gaxuremewuger/phonics_worksheets_free.pdf
    • https://s3.amazonaws.com/podawakumepewez/how_to_reset_samsung_s9_to_factory_settings_without_password.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100aa.bin
0d016deb01e22cde9c6b561899d2e1ace32bb3d19d0f2fdf710935fff6e0f815		 pdf-font-stream PDF embedded font (sfnt) at offset 0x100AA 5476 bytes
font_01_sfnt_off00011337.bin
0623d483a336e0403949735c39b625892e153cda3911b0bf659b8db4da062641		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11337 11208 bytes
font_02_sfnt_off000139af.bin
5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139AF 16060 bytes

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