Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9a6b7aec3af85b…

MALICIOUS

PDF

74.2 KB Created: 2021-03-28 14:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7940679acffa58028aa2c2c5218be4b6 SHA-1: 6a14ee64a80c2f659cbeef9cb55a2676471f1070 SHA-256: ec9a6b7aec3af85b898a4807ac380d395993ea687c64d8a0bbf026c9acd3eda5
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a website disguised as an assessment answer key, likely a phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/wix?keyword=7.4+homeostasis+and+cells+assessment+answers
    • http://lalashoppen.online/grim_quest_old_school_rpg_mod_apk_wendgamesz3zcl.pdf
    • https://xewurilarigifu.weebly.com/uploads/1/3/4/2/134236076/7944f17.pdf
    • https://bukivobiwizu.weebly.com/uploads/1/3/4/0/134097020/zuwaj.pdf
    • https://cdn.sqhk.co/zabitokepum/amtL41E/void_tyrant_ios_review.pdf
    • http://voiprormul.xyz/electric_circuits_10th_editionbpyae.pdf
    • https://dosevabif.weebly.com/uploads/1/3/1/6/131637409/vunamizidumatu.pdf
    • https://cdn.sqhk.co/limizolaxa/gficgh9/8730840920.pdf
    • https://cdn.sqhk.co/wimedizi/heIhhge/99714682111.pdf
    • https://cdn.sqhk.co/doxufojixene/hc6ghEr/minerva_ohio_from_my_location.pdf
    • http://mefizilexofe.66ghz.com/apartment_rental_agreement_form.pdf
    • http://sunepoxuvigos.66ghz.com/causes_of_absolutism_in_europe.pdf
    • http://boomerangoo.site/central_pneumatic_air_compressor_8_gallon_oil_typepk41n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/sitok/gre_math_cheat_sheet.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/36959598036.pdf
    • https://s3.amazonaws.com/bejeseja/logitech_k400_keyboard_settings.pdf
    • https://uploads.strikinglycdn.com/files/be826a30-28ca-4758-a26f-000566fdea33/53674459463.pdf
    • https://uploads.strikinglycdn.com/files/bf7f5f1b-11ee-42a4-9211-d2aae037e146/how_to_check_caller_id_on_panasonic_phone.pdf
    • https://s3.amazonaws.com/zidenigad/28159112242.pdf
    • https://uploads.strikinglycdn.com/files/5b7f20ed-89bb-4249-858e-4c1010b88f0d/what_is_a_commercial_learners_permit.pdf
    • https://uploads.strikinglycdn.com/files/54f86063-71d0-46ba-9b3f-a2684de52e2f/single_phase_vfd_3_phase_motor.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_off0000e464.bin
17d9dadee8ceb6e7c9aa9a40392ea5e6f134e0a13e8a93a5792fcbb91d848e25
pdf-font-stream PDF embedded font (sfnt) at offset 0xE464 5376 bytes
font_01_sfnt_off0000f69f.bin
01f7904f968d11f1c5219930feddebad040dd339a5b2c08ccc55d0856088f6e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF69F 10764 bytes