Malicious PDF — malware analysis report

Static analysis result for SHA-256 090904c1ea7f0598…

MALICIOUS

PDF

79.4 KB Created: 2021-04-29 03:27:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f9592eb61e6d9bc840d9bdfb2128654e SHA-1: cb06f5b4a5670f7ed692ae4b60859676060c8855 SHA-256: 090904c1ea7f0598eccc5e525ad4c90c339b638a92cfafb52dd957ccf18f73e1
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating an external URI, which points to a suspicious domain. ClamAV also detected this file as a phishing trojan. The document body, though heavily obfuscated, appears to be related to statistical information, likely a lure to disguise the malicious intent of directing users to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://jacksth.ru/strik?utm_term=how+to+find+z+score+from+table PDF link annotation
    • http://pulamadedo.iblogger.org/10125884793.pdfIn PDF document text
    • http://dofoziteda.iblogger.org/scholarship_award_letter.pdfIn PDF document text
    • http://vatamulejuvovi.22web.org/pabapazegowowoluvo.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/nunakixuma/to_kill_a_mockingbird_study_guide_answers_chapters_12-31.pdfIn PDF document text
    • https://s3.amazonaws.com/zagapaxa/mind_maps_flow_charts.pdfIn PDF document text
    • http://bijoxiwakofavoj.epizy.com/puvoxinejepuzaluviva.pdfIn PDF document text
    • http://witimalolikoji.rf.gd/68115133211.pdfIn PDF document text
    • https://s3.amazonaws.com/topipovikapari/98637431654.pdfIn PDF document text
    • https://s3.amazonaws.com/wolawatin/do_you_have_to_use_window_kit_for_portable_air_conditioner.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/mackintosh_rubber_sheet_in_ahmedabad.pdfIn PDF document text
    • http://regipikiwubadov.epizy.com/54058972834.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/sowuvufimitakokibugavudov.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/wefalategojodomumutewetig.pdfIn PDF document text
    • http://xiwaresijo.epizy.com/cch_to_sheet_menu_trong_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/rca_rcr3273r_universal_remote_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/samsung_ipolis_camera_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vidadaviwal/cuantos_litros_entran_en_un_centimetro_cubico.pdfIn PDF document text
    • http://vaxomuterok.epizy.com/54818920624.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/good_strategy_bad_strategy_summary.pdfIn PDF document text
    • https://s3.amazonaws.com/masevewi/dissertation_sur_le_civisme.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/37828943491.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/pemizareluwibubezivikoju.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/azar_hack_version_apk.pdfIn PDF document text
    • http://togalufunepobaz.rf.gd/how_to_install_bunker_hill_solar_security_light.pdfIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/data_analysis_a_bayesian_tutorial_second_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/nefagolom/brule_river_steelhead_report.pdfIn PDF document text
    • http://xamuboba.epizy.com/el_banquete_o_del_amor_platon.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/kipepawimurusamasagowetuk.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_off0000ebc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC9 5196 bytes
SHA-256: 2cffa6c5135a53604c4ad9ef2397caed82d0e5627693fa374c9b40548e67c9a9
font_01_sfnt_off0000fd6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6A 10956 bytes
SHA-256: a8d6b0f28f70e0697262faabd91c30f002f4fe25a02ac2b266a491757cbf1e34
font_02_sfnt_off000121cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CB 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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