Malicious PDF — malware analysis report

Static analysis result for SHA-256 937ff013c24637ba…

MALICIOUS

PDF

83.4 KB Created: 2021-03-15 14:43:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f716759998527df68d9cc4ae78c33972 SHA-1: bf394a1d2a2df50a892ebb8f2734d0aff7f64cad SHA-256: 937ff013c24637bab97b5a0163cd22e679c120b150d0ceddf0ecb85cd1320e5c
144 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating the presence of external URIs and embedded URLs, with one URL specifically mentioning 'root phone apk 2020'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or trojan delivery. The document body, though partially corrupted, contains references to 'root phone apk 2020' and 'wkhtmltopdf', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://jottigo.ru/wix?keyword=root+phone+apk+2020
    • https://cdn.sqhk.co/xojelumegasi/6geTjbY/didion_milling_wisconsin.pdf
    • http://afracheat1.xyz/9156038047075dl0.pdf
    • https://cdn.sqhk.co/bokirebi/wiaxhhg/train_simulator_route_building_manual.pdf
    • http://vbruti.site/balada_para_adelina_partitura_pianoide0t.pdf
    • http://strongcreditscore.info/50431933017rrjfy.pdf
    • http://deromgroup.com/kidde_hardwire_smoke_detector_with_9v_battery_backup_6-pack3m5ee.pdf
    • https://cdn.sqhk.co/poniroxam/hjAiaW4/koxulatob.pdf
    • https://cdn.sqhk.co/silinetufid/bEGgjwp/60852447149.pdf
    • https://cdn.sqhk.co/wadusazilox/FNZhjnr/action_hero_biju_songs_lyrics.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8953c398-8f69-476a-95c6-68de6fd99a14/hp_photosmart_c3180_printer.pdf
    • https://uploads.strikinglycdn.com/files/f6ae8bae-e606-4e4c-9693-e8212a70cd5a/how_does_epsom_salt_draw_out_splinters.pdf
    • https://s3.amazonaws.com/limewub/game_minecraft_xbox_360_free.pdf
    • https://uploads.strikinglycdn.com/files/b6e829a4-0a74-471e-b2dc-539f59b6c3f5/chevy_traverse_says_engine_power_reduced.pdf
    • https://uploads.strikinglycdn.com/files/c93c19b4-056e-449f-9224-d07bd9c1c22b/fofolite.pdf
    • https://s3.amazonaws.com/tixedujegibex/how_do_you_abbreviate_states_in_ap_style.pdf
    • https://uploads.strikinglycdn.com/files/308d0e2d-3f33-4027-8c96-b49214883ecc/delisagusu.pdf
    • https://s3.amazonaws.com/fukepez/budget_spreadsheet_excel_reddit.pdf
    • https://uploads.strikinglycdn.com/files/755ba789-5b5b-4028-82e3-3facef568f05/cmd_hack_codes_list.pdf
    • https://uploads.strikinglycdn.com/files/288bce4f-9b09-4cb1-ac2d-d4001f8964f8/the_temple_in_man_the_secrets_of_ancient_egypt.pdf
    • https://s3.amazonaws.com/pujirageg/drawing_classes_for_adults_near_me.pdf
    • https://uploads.strikinglycdn.com/files/17ecd482-a7c2-4587-b022-fe9e23fe6d0a/italo_calvino_invisible_cities_review.pdf
    • https://s3.amazonaws.com/gumagabu/chartered_engineer_application_form.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/
    • https://uploads.strikinglycdn.com/fi
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010912.bin
031ba0affd513d232067ca1b99a52facec4e3bfb54b16b3e217909fefc49af60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10912 4948 bytes
font_01_sfnt_off000119e7.bin
0e09651ee42c7ab81ce289c789b2a7f3adeb95fe35a81852605fd25061256c21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E7 11432 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.