Malicious PDF — malware analysis report

Static analysis result for SHA-256 88456809abf3835c…

MALICIOUS

PDF

78.5 KB Created: 2021-04-06 05:10:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 72dda9982cb15aad8f5f70a2bedb4f4f SHA-1: f5a1df7739ab873e29b7535f6c569ba298d664a7 SHA-256: 88456809abf3835cecd463890807b5b73c6098eaf1bd6925fe50241356840187
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, which is also listed as an IOC. The ML classifier and ClamAV detection strongly indicate maliciousness. Although no scripts were extracted, the presence of a suspicious URL within the document body suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/123?utm_term=donkey+kong+country+tropical+freeze+speedrun+guide PDF link annotation
    • http://tefituguj.iblogger.org/cederj_plataforma_2019._2.pdfIn PDF document text
    • http://guberugolezo.22web.org/samsung_sdr-5100n_no_hdd_installed.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/fowikorejodi/bangladesh_day_night_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e68ba82-ee95-4738-9175-3bc97160cfbe/rasusasenenukapuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1cdb4dd-cfce-4cce-b239-6bae27a1d40d/australian_army_officer_dress_uniform.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54c46478-4f98-4bcb-ae19-791900124a3e/xemiraladobopejosefixa.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/minn_kota_riptide_55_transom_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/archicad_14_software_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56086376-ede9-440d-a8db-c09cfd642686/zumapov.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/davaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28ac2ad2-8ee6-489c-b23f-18b75f199f7c/40609922994.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/665f6bd0-7724-4cc8-aff2-a7b857e8b840/kangertech_evod_pro_how_to_use.pdfIn PDF document text
    • http://sokurunofizune.rf.gd/celestron_astromaster_114_battery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab7f58c-356e-498d-b740-8a1b7e4705b7/loxakoderatejuxaluvofolas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e60b30f-b6a6-4bd6-a0e6-b88f631f71c8/feresowodewuwunef.pdfIn PDF document text
    • https://s3.amazonaws.com/wozowuledij/advantages_of_modern_technology_in_agriculture.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/gexuxesinokepepi.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/tajusiluwagudekerimerov.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/irobot_roomba_670_good_guys.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50dc94bd-e1af-43cf-881a-9590cb97f266/sonumabekuminugoxubi.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/beyblade_metal_fusion_games.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/accu-_sort_22_series_ii_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/sodufadebelo.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/nuvisipopurafiwagudajuteb.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_off0000e715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE715 5420 bytes
SHA-256: bd8a44e0e5910278dcb9e05d884fea49aa22ef923af4dc2525fd184519ab1db1
font_01_sfnt_off0000f9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AC 10504 bytes
SHA-256: 3965db26cd8f5473153a7753ff3d55b74874993084875650e438eebf105ae6d4
font_02_sfnt_off00011d78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D78 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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