Malicious PDF — malware analysis report

Static analysis result for SHA-256 56c7d0633c5657be…

MALICIOUS

PDF

85.5 KB Created: 2021-02-26 19:22:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 7131c600862db4f94e7f95a7d967775e SHA-1: efb905bf8f32b27e6ae683843a11dd364e403bb7 SHA-256: 56c7d0633c5657be47356d029d78d5234b9d1236d6c166960ecfbbc153177e86
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL, likely intended to redirect the user to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, appears to be a lure related to printer issues, aiming to trick users into clicking the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/award?keyword=hp+5520+printer+cartridge+jam PDF link annotation
    • https://cdn.sqhk.co/sebidurubuze/cjcgeHP/52177845771.pdfIn PDF document text
    • https://cdn.sqhk.co/lixipadiwel/JBThfVL/simulacra_pipe_dreams_good_ending.pdfIn PDF document text
    • http://mp4.design/it_act_intermediary_guidelines_2011n7ecn.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/zakidijevapolin.pdfIn PDF document text
    • https://cdn.sqhk.co/fetadupozo/hajg6NG/sandstone_flags_warrington.pdfIn PDF document text
    • http://republvinb.fun/game_genie_ps3_white_knight_chronicles_2_codeshxo0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tapelu/leave_of_absence_template_letter.pdfIn PDF document text
    • http://bojibag.epizy.com/72793226192.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/kindle_app_not_working_on_android_2018.pdfIn PDF document text
    • http://pojoxonofed.rf.gd/shocking_synonym_formal.pdfIn PDF document text
    • http://baverasoge.epizy.com/bumeb.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/dewalt_12v_impact_drill_driver_combo_kit.pdfIn PDF document text
    • http://wedalavunobuwe.rf.gd/charlas_de_seguridad_de_5_minutos_senati.pdfIn PDF document text
    • http://gigogapa.epizy.com/jurnal_jamur_ascomycota.pdfIn PDF document text
    • http://bilunijo.epizy.com/miami_hourly_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/android_anonymous_call_block.pdfIn PDF document text
    • http://bumupumelagel.epizy.com/96183941446.pdfIn PDF document text
    • http://rajemezipuz.rf.gd/beeruva_hd_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/movies_free_online_fast.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11207 5616 bytes
SHA-256: 25eee64955bd11dc35d85bbadf40de5f1129bea5e4e59e472f7fa869ae4c6387
font_01_sfnt_off0001251a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1251A 10472 bytes
SHA-256: f8c2425135ab6ec55415bd3c33e5fed0b9438402228c52c4e0c9c6d507303b82

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