Malicious PDF — malware analysis report

Static analysis result for SHA-256 edb17bfe0e12319d…

MALICIOUS

PDF

79.5 KB Created: 2021-03-28 22:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19be161e18e17f61d952375e210b046b SHA-1: 139273912b5316932fa18b398047e20562645683 SHA-256: edb17bfe0e12319d1e9089c067c94962d4b8b611eafa37d16a5966511c3786f1
96 Risk Score

Malware Insights

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

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware delivery attempt. The document body is heavily obfuscated, but the presence of the URI and the heuristic firings strongly indicate malicious intent.

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://dafemum.ru/award?keyword=medical+physical+fitness+certificate+format+pdf
    • http://biomaniks.website/how_many_layers_in_tcp_ip_protocol_suitegi2d6.pdf
    • http://gayerkan.com/eos_650d_manualcv82g.pdf
    • http://kraftmann.su/persepolis_full_movie_english_subtitlesd1hzj.pdf
    • http://fofolep.mywebcommunity.org/valores_morales_ejemplos.pdf
    • http://wisitens.online/241477245661g4xx.pdf
    • http://sejerodetupumil.medianewsonline.com/36795055218.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vinejivunitego/16626547667.pdf
    • https://s3.amazonaws.com/gebukil/bandos_guide_alora.pdf
    • https://uploads.strikinglycdn.com/files/ece0e863-8a73-4b2f-b7b2-2de379c42ad8/what_does_wps_button_mean_on_wifi_box.pdf
    • https://s3.amazonaws.com/gedesisumi/hoover_steamvac_spinscrub_carpet_cleaner.pdf
    • https://uploads.strikinglycdn.com/files/d3664d7e-204c-4f97-9470-b9e366bb39b8/47274993800.pdf
    • https://uploads.strikinglycdn.com/files/e99fcdd3-6389-450e-a01d-75b72aeb54b1/evenflo_gold_pivot_xpand_stroller_second_seat_moonstone.pdf
    • http://zekezixurul.onlinewebshop.net/understanding_the_bouguer_anomaly.pdf
    • https://s3.amazonaws.com/nojemi/puzofafijomalixol.pdf
    • https://s3.amazonaws.com/jevopemosod/musilenevexejinojedivog.pdf
    • https://s3.amazonaws.com/libeganot/what_is_the_theme_of_esperanza_rising.pdf
    • https://uploads.strikinglycdn.com/files/a5711627-2ed3-4ddb-8115-2b6b9100baa0/xugexepad.pdf
    • https://uploads.strikinglycdn.com/files/fb54cbc0-b363-4e26-89a7-d190b608654d/mega_neon_pet_rock_adopt_me.pdf
    • https://s3.amazonaws.com/wujafivabipo/limiting_reactants_stoichiometry_worksheet.pdf
    • https://uploads.strikinglycdn.com/files/cc7505da-b642-4713-821d-d1a7a2c92a30/how_light_pilot_on_gas_fireplace.pdf
    • http://kalasoziluxolim.myartsonline.com/zavuwakakegovifobuvimafiw.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_off0000f944.bin
da84fe48ddce117c021d845fe75a283175ea8400129ce4275d8e0e2f444ffcb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF944 5500 bytes
font_01_sfnt_off00010be7.bin
cef6408a42d47e98be2937743a34cd0490714a416eb967683787dc3217ddf16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE7 10688 bytes

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