Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cf37d1b31e9085b…

MALICIOUS

PDF

76.9 KB Created: 2021-03-21 11:04:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2f74dbdba2cb283b7f42fad9d13309a7 SHA-1: 101da1c7d7df8476e0669402bfdec805f3f4e92e SHA-256: 2cf37d1b31e9085bfa4bb2669989cd173c7a28d18a08a99348920f02a9a5bfdf
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/award?keyword=linked+list+c+code+pdf PDF link annotation
    • https://cdn.sqhk.co/dibirolinu/hfqhcif/wartide_game_download_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/hjkIgdd/43943929540.pdfIn PDF document text
    • https://cdn.sqhk.co/pugudanirav/idQr2oc/47245624038.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/GAgerJM/fast_and_furious_mobile_wallpaper.pdfIn PDF document text
    • https://cdn.sqhk.co/falugojafat/hiLUvdn/feisty_pets_unicorn_walmart.pdfIn PDF document text
    • https://cdn.sqhk.co/nugilatunu/e40TYwS/fire_truck_siren_sounds_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/hdehijh/satisfying_slime_videos_not_on_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/merabuvi/Vibhcig/live_anime_wallpaper_iphone_app.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/iohaghP/recharge_pcs_card_en_ligne.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/ijdicjc/download_samsung_stock_music_player_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bamazaludez/jiGeqeD/lekifanenoteteruvufumu.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/jggiehi/kisemulawix.pdfIn PDF document text
    • https://cdn.sqhk.co/fexiseme/SgikjhG/music_inclusion_coalition.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/nawuvud/xasoxasutijudop.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/91197238333.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/zivubepe.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/filtrete_thermostat_user_manual_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/89848440357.pdfIn PDF document text
    • https://s3.amazonaws.com/wexoteluwag/the_vanishing_of_ethan_carter_guide_trophees.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/abbas_ibn_firnas.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/prohibido_enamorarse_de_adam_walker_2.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/high_school_musical_scripts.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e35c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35C 4636 bytes
SHA-256: 34f2ed94e29b73e1dfbf4916151916f883fddb584b0c8ffa55530c4d75353b8d
font_01_sfnt_off0000f331.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF331 11000 bytes
SHA-256: c914333f1d4274a20549e99471bd1b96d7baab93d33cda39921f3d379a21ae39
font_02_sfnt_off0001187a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1187A 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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