Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb059b7df549cb3f…

MALICIOUS

PDF

74.2 KB Created: 2021-03-09 08:56:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: deba006f8ce578fb46f3d3e71d3cebaa SHA-1: be65dddba6806bad10cde93f7a42839b92db372b SHA-256: eb059b7df549cb3f4950d07a7f5857c4a09247d217a3a9e81daa119db5b74c9a
96 Risk Score

Malware Insights

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

The PDF file is classified as malicious by ML and ClamAV, and contains an embedded URI pointing to a suspicious domain. The document body, though heavily obfuscated, suggests a lure related to educational content ('heat capacity worksheet'). The presence of embedded URLs and the overall classification strongly indicate a phishing attempt to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://zajinet.ru/wix?keyword=heat+capacity+worksheet
    • http://pisibebix.22web.org/kazedamikekaxez.pdf
    • https://cdn.sqhk.co/bexefoboxevi/g4dV4AP/fosokaxigavumuzusujet.pdf
    • https://cdn.sqhk.co/legesizas/GSaPGha/spine_deck_for_chair.pdf
    • https://cdn.sqhk.co/jotenitix/UjbhjhI/jeroxejonupofadawotijul.pdf
    • https://cdn.sqhk.co/zubejavaxuvu/hiOjbib/new_artificial_intelligence_companies_to_invest_in.pdf
    • https://cdn.sqhk.co/nimotixalulo/6jbiahd/selamufapibuvuz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/20a68dad-24e4-4fb7-bb78-cfdd4b9acd4a/37019965564.pdf
    • https://uploads.strikinglycdn.com/files/53ff1631-7d9c-40b2-8ec5-75d7ee0fbd34/how_to_mixing_and_mastering_in_fl_studio.pdf
    • https://uploads.strikinglycdn.com/files/d8b6c90a-f8fb-4a05-a77f-3ec8df5cc74c/4587588428.pdf
    • https://uploads.strikinglycdn.com/files/1f31b612-0427-426d-b3c3-0483aec9fe68/datiwinufuwijuzadogotama.pdf
    • https://uploads.strikinglycdn.com/files/ebe7bc73-6774-4850-a251-107e7e0a62ec/kozoxibesiboxen.pdf
    • https://uploads.strikinglycdn.com/files/c0fbdce4-a0fa-4c2d-8cb4-2e0737e4f4c9/what_breed_of_horse_was_used_by_knights.pdf
    • https://uploads.strikinglycdn.com/files/62821941-8bcb-4cc1-ac42-24c158c9dd55/how_to_connect_bluetooth_in_sony_xplod.pdf
    • https://s3.amazonaws.com/lurutopobi/20070151317.pdf
    • http://rigutogivopum.epizy.com/metformin_overdose_what_to_do.pdf
    • http://malukofe.rf.gd/kugasigekiw.pdf
    • https://uploads.strikinglycdn.com/files/6ca0a902-05e4-47c0-88ab-74997d305f69/71278005049.pdf
    • https://uploads.strikinglycdn.com/files/04b0dd35-a466-4191-a2be-65d817c99d0d/zoo_york_watches_waterproof.pdf
    • https://uploads.strikinglycdn.com/files/2bfe22fb-6e6a-41ab-b924-2ef0e1986d13/vibe_sound_usb_turntable_software_download.pdf
    • https://uploads.strikinglycdn.com/files/b74705a2-e9fc-4680-ba6f-2c6bde529ff5/23323973837.pdf
    • https://uploads.strikinglycdn.com/files/e3970281-3e23-44e5-96f3-dcde43b64d5b/jetubi.pdf
    • https://s3.amazonaws.com/sazomo/pulijelunejuxarexu.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_off0000e6d8.bin
903895893e5247d25b3bc19b285cd5a42bcfd067ecd2bd32130a0196c14ad6c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D8 5208 bytes
font_01_sfnt_off0000f89f.bin
a73bb087205b18c2074235cffad5ec5e10bbd2be6b70e83312151fc484c1c0a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF89F 10212 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.