Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e43834d85b21647…

MALICIOUS

PDF

72.4 KB Created: 2021-03-18 04:44:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e51069280faceea714ab3a02fb1b7c0f SHA-1: 5fde02c5ba007d593fb108677921282a503c6e93 SHA-256: 5e43834d85b21647a1629a0f60b2c47eec6e69df92a89a80a588dd187c46863e
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is classified as malicious by ML and ClamAV. The document body, though heavily obfuscated, suggests a lure related to a school bus schedule, which is likely intended to trick the user into clicking the malicious link. The presence of embedded URLs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://bologen.ru/wix?keyword=anne+arundel+county+school+bus+schedule+2019-20
    • https://cdn.sqhk.co/kososojog/WchigQv/93424291598.pdf
    • https://cdn.sqhk.co/domuduxuro/jdkiiWR/lanagetawalimosigub.pdf
    • http://wijetaz.mypressonline.com/dibovuborisiv.pdf
    • http://mnclassis.org/how_to_use_a_rainbow_vacuum_cleaner7yvmp.pdf
    • https://cdn.sqhk.co/bidelefo/Wjiicia/rugesonusazo.pdf
    • http://gagogepatajebe.medianewsonline.com/antibiotic_prophylaxis_and_recurrent_urinary_tract_infection_in_children.pdf
    • http://topvideo.design/6182280203094ow8.pdf
    • https://cdn.sqhk.co/napumefu/jeielje/f1_car_races_gta.pdf
    • http://jenewazajasazu.getenjoyment.net/wawugamixalu.pdf
    • http://falorilipeb.mywebcommunity.org/58757488983.pdf
    • http://pagavopalubutu.scienceontheweb.net/amelie_soundtrack_sheet_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/tedowafomaru/windows_server_2012_r2_standard_oem_iso.pdf
    • https://s3.amazonaws.com/tonisefoteka/pagusajaxurufujisuwikugag.pdf
    • https://s3.amazonaws.com/topipovikapari/25188853665.pdf
    • https://s3.amazonaws.com/pusolefosex/jekogogakeguvuje.pdf
    • https://s3.amazonaws.com/fadupazageraf/diminishing_value_depreciation_spreadsheet.pdf
    • https://s3.amazonaws.com/jadudusujuje/item_sheet_tft_9._19.pdf
    • https://uploads.strikinglycdn.com/files/bbecaf87-a05e-4bd4-a748-f26d5e23c149/que_debe_hacer_rrhh_en_una_empresa.pdf
    • https://s3.amazonaws.com/satuja/rezulabukat.pdf
    • https://uploads.strikinglycdn.com/files/e4035550-e55d-4406-ad8f-5072cd12c161/prentice_hall_america_history_of_our_nation_answers.pdf
    • https://s3.amazonaws.com/rutufokedizon/71197947199.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf71.bin
48b693ecc7dc69bc4a2c9c7c190f821076487240aaa34495aef527680d163c78		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF71 5608 bytes
font_01_sfnt_off0000e279.bin
0e48a8ffa75506cbeee4784fd712fdca2d19096f6919c7d8ef2d935c41e999d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE279 9828 bytes
font_02_sfnt_off0001042d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1042D 4324 bytes

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