Malicious PDF — malware analysis report

Static analysis result for SHA-256 1415145b19218d1d…

MALICIOUS

PDF

69.1 KB Created: 2021-03-31 02:25:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 452d5bf4d324092e3b68439d6a652068 SHA-1: eda77909d34a786ac7c31ff92b8898a31db7bf32 SHA-256: 1415145b19218d1d83862a76fdc975059e801948a2293b9ad886921c8e58f1bd
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 pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a high ML classification score, further supported by ClamAV detecting it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'spring batch reference documentation'.

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://jacksth.ru/award?keyword=spring+batch+reference+documentation+pdf PDF link annotation
    • http://fekevopimibun.sportsontheweb.net/astrology_books_in_tamil.pdfIn PDF document text
    • http://misujupino.getenjoyment.net/lic_jeevan_saral_chart.pdfIn PDF document text
    • http://kivolugog.mypressonline.com/metric_screw_thread_chart.pdfIn PDF document text
    • http://lasiwefomibew.sportsontheweb.net/xerostomia_journal.pdfIn PDF document text
    • http://vejuwetuk.mypressonline.com/79037004714.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0566bc5f-c730-41b5-8596-1cfb90f1932b/govawonenonogusinuwiv.pdfIn PDF document text
    • http://romapubimowa.onlinewebshop.net/gakitivolisipenolajadirur.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/how_s_life_going_best_answer.pdfIn PDF document text
    • http://bitines.myartsonline.com/77921163280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/457d8e07-ed74-453f-bd24-be68f115f05e/29446964721.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00e68423-0497-40a6-9233-d3c6f6e1c200/bakisowal.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/55_easy_acrylic_painting_ideas_on_canvas.pdfIn PDF document text
    • http://mepitar.atwebpages.com/7007793355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f073b547-6512-4ca2-bb7a-d751806ae646/35866979555.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/maytag_bravos_xl_washer_and_dryer_lowes.pdfIn PDF document text
    • https://s3.amazonaws.com/tigovatolis/world_map_image_7_continents_and_5_oceans.pdfIn PDF document text
    • https://s3.amazonaws.com/lijopavexanuse/6502671378.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/39524158052.pdfIn PDF document text
    • https://s3.amazonaws.com/jivuxo/dorelifibavomar.pdfIn PDF document text
    • https://s3.amazonaws.com/futamo/dupese.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_off0000d0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E2 5604 bytes
SHA-256: f6b2d0cfc32aa262f542095d93d46c8bd98e5c0baeaa9b34087c0422c3071e3a
font_01_sfnt_off0000e3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C7 10340 bytes
SHA-256: 1f29e22802960d634990ed76d951e92b69a91b3ad1c0a2c4459a95746420e43b

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