Malicious PDF — malware analysis report

Static analysis result for SHA-256 931fc8307884545b…

MALICIOUS

PDF

75.2 KB Created: 2021-03-30 01:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a8d9562024283523807015f3dc24b39 SHA-1: 998f493e35f40cc9dd293b0005b1571fc0fc2a35 SHA-256: 931fc8307884545be6ec00fe181a867ee6a562a0a99746cdf45f90d80a596efc
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL suggests a phishing lure related to a 'carer allowance form', aiming to trick users into downloading a payload. Although no scripts were explicitly extracted, the PDF structure and embedded URI are strong indicators of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://druttle.ru/award?keyword=carer+allowance+form+pdf
    • http://fawikenaxalu.scienceontheweb.net/83716131634.pdf
    • http://pejokepi.mywebcommunity.org/bacterial_classification_and_taxonomy.pdf
    • http://mopewogubit.getenjoyment.net/vector_addition_component_method_problems_with_solutions.pdf
    • http://soul-felt.com/348527384778zjfe.pdf
    • http://mitedujonajezed.scienceontheweb.net/mibosi.pdf
    • http://vivekawiga.sportsontheweb.net/20190851716.pdf
    • http://dujegud.getenjoyment.net/13203012444.pdf
    • http://zovofuti.mygamesonline.org/adda247_arithmetic_book.pdf
    • http://pixunune.sportsontheweb.net/clash_of_kings_pov_chapters.pdf
    • http://krokoboko6.xyz/convert_to_jpg_free_download_windows_7twbr1.pdf
    • http://teatr-art.com/vadetorodimareri6ykk8.pdf
    • http://abanca-electronica.com/bapugazetuzikubewusxo747.pdf
    • http://blablablacar.online/dragon_ball_z_tag_team_save_data_ppssppxrs87.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://leparitupoxow.onlinewebshop.net/26532960322.pdf
    • https://uploads.strikinglycdn.com/files/bda17515-1dd7-4e2e-9fc0-338e658354b6/61979241587.pdf
    • https://uploads.strikinglycdn.com/files/5ee1dc4b-031f-4f1e-9e1c-67673b905ed4/tecumseh_ohh60_torque_specs.pdf
    • http://zopefunexot.epizy.com/aayirathil_oruvan_full_movie_hd_720p.pdf
    • https://uploads.strikinglycdn.com/files/4ae3c6d6-f4b1-403b-8d55-a32b9a8efd86/hebrew-greek_keyword_study_bible-niv-wide_margin.pdf
    • http://gudinomid.rf.gd/69174023123.pdf
    • http://badiwofotafazol.epizy.com/simple_biodata_form_free_download.pdf
    • http://kugajevekafino.myartsonline.com/jixetiwupuwakase.pdf
    • https://uploads.strikinglycdn.com/files/5cbf6c73-c807-4b1e-ab18-ae5fbac1f3dc/savosonum.pdf
    • http://gaxezakowe.epizy.com/livre_bouddhisme_gratuit.pdf
    • http://xanomake.epizy.com/westinghouse_3-outlet_outdoor_heavy_duty_digital_photocell_timer_instructions.pdf
    • https://uploads.strikinglycdn.com/files/34dd08b3-aeac-4a46-bbd8-9334ce4d5e6d/94834440876.pdf
    • https://uploads.strikinglycdn.com/files/4fdd9944-f6f7-4ccf-b6f3-bfe15ca82265/47613456755.pdf
    • https://uploads.strikinglycdn.com/files/a9cd8612-0d74-40d1-b2f1-e6b766bd7555/zogukebedosojujelis.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_off0000e9d8.bin
7fe74a263795f97f8ba228dfc1a6da67b4f03bd82ad4c8b03730d1d45b784f8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 5120 bytes
font_01_sfnt_off0000fb42.bin
632b83b6b2f2c73dc3506ced3fec6ee93c3667755a4f7ff0d7d6bdb56b8bbd3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB42 10692 bytes

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