Malicious PDF — malware analysis report

Static analysis result for SHA-256 dacf9a760a38ff57…

MALICIOUS

PDF

68.0 KB Created: 2021-03-14 03:15:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2bcfd300270bc0190e59d5523f44db8a SHA-1: d28b73e6446a03f9345142cb3be48b3c86ec122e SHA-256: dacf9a760a38ff5798c593be7a22dd6ca30a2d6001b6ca86afc0558801be95a0
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, suggesting it's used to redirect users to a phishing or malware distribution site. The document body, though heavily obfuscated, contains text related to 'beautiful baby background images' which is likely a lure to disguise the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/123?utm_term=beautiful+baby+background+images
    • http://gatorama.site/modelo_contrato_de_arrendamiento_vivienda_colombiar3qgm.pdf
    • https://static.s123-cdn-static.com/uploads/4380413/normal_5feeac10129f0.pdf
    • http://bewewafip.scienceontheweb.net/367986398.pdf
    • http://markettop.pro/plan_y_programa_2011_geografa_secundaria32idy.pdf
    • http://dvertsoff.ru/potassium_perchlorate_acid_or_basenq9sb.pdf
    • http://javaxirivibewi.mygamesonline.org/fixeguneritumawadefatij.pdf
    • https://static.s123-cdn-static.com/uploads/4446789/normal_5febbee150421.pdf
    • http://lifegirls.site/hunger_games_mockingjay_book_analysis5r68t.pdf
    • http://cabinetshub.xyz/gevanedego0c3p5.pdf
    • https://cdn-cms.f-static.net/uploads/4379618/normal_5fea396cc9084.pdf
    • http://vojemodipu.sportsontheweb.net/fogebisegosufo.pdf
    • https://cdn-cms.f-static.net/uploads/4419832/normal_6033a29bf191a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c8a3e9f4-9fc0-4947-a6cc-31eda3ce4b0a/kinepaka.pdf
    • https://uploads.strikinglycdn.com/files/fbfb87e6-6efa-496d-b07d-b16272583ffe/lds_primary_2021_lessons.pdf
    • https://uploads.strikinglycdn.com/files/dc3d1d75-e7fb-4800-bf51-dc3aa286ade0/mercury_9.9_hp_4_stroke_oil_change.pdf
    • https://uploads.strikinglycdn.com/files/8777ad40-784b-4957-a756-f72fa0896244/monefuzam.pdf
    • https://uploads.strikinglycdn.com/files/03a4ccc4-a165-43df-a36c-5a3f6cf29808/what_is_link2cell_bluetooth.pdf
    • https://uploads.strikinglycdn.com/files/7758d0c0-e836-48b3-a378-825b4bc6a565/how_often_should_transmission_fluid_be_changed_hyundai.pdf
    • https://uploads.strikinglycdn.com/files/72ed375d-9316-4dd3-b190-870403e1ebaa/how_to_install_a_clock_movement_kit.pdf
    • https://uploads.strikinglycdn.com/files/56221872-a19c-4f24-8e29-8bb3d34b8b15/rijanitipejuvidazariwa.pdf
    • https://uploads.strikinglycdn.com/files/8c51d30d-8fc2-431f-9d05-f1ed24a1c23f/where_do_hamsters_come_from_math_joke.pdf
    • http://zepizevut.atwebpages.com/fender_mustang_gt_amplifier_update_server_is_unreachable.pdf
    • https://uploads.strikinglycdn.com/files/398dda65-44cb-480a-9fb3-787efcac7786/jevateziwo.pdf
    • https://uploads.strikinglycdn.com/files/e2635016-ac5e-4ca4-971b-92e780eee394/jesus_calling_sarah_young_enjoying_peace_in_his_presence.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_off0000d096.bin
b3d1337c746027b8ea46306ebcadbf5e8511b34934ad690e0d725f347b8aa18d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 5696 bytes
font_01_sfnt_off0000e3f5.bin
4725e2c9a6b501c6555e0514428e0826f182ee53638e2eafca2886f41a85f130		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F5 9028 bytes

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