Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dc9d24b2d973ca7…

MALICIOUS

PDF

69.3 KB Created: 2021-03-01 23:12:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 340405d3a789f689dc21eb2355ab4ff5 SHA-1: d0051b6fe9076b3f17c74818b9670be6afd1ab09 SHA-256: 8dc9d24b2d973ca7dd8e7d40173f9db640c6856316caa72b59332a064cbbf747
96 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URI pointing to 'zajinet.ru', which is likely part of a phishing or malware distribution scheme. The document body, though truncated, suggests a lure related to an "Excalibur car alarm". No scripts were extracted, but the PDF structure and embedded URI are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/aws?utm_term=excalibur+car+alarm PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4415055/normal_602d3571926cd.pdfIn PDF document text
    • http://zerkalo-fugicar.website/rimworld_best_cropsm61ms.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450240/normal_5feb689975bae.pdfIn PDF document text
    • http://piredvizhnik.com/corner_of_the_sky_sheet_music_freeglqee.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/kenmore_mini_ultra_sewing_machine_manual_11206.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389571/normal_5fdfc089a1fe3.pdfIn PDF document text
    • http://top-shop-store.website/kajizotatanepidofajaczndr.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383912/normal_5fec2688535b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dufojamimusim.atwebpages.com/what_is_the_best_music_maker_app.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/skype_for_chromebook_acer.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/how_much_are_air_force_ones_white.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/babumirore.pdfIn PDF document text
    • https://s3.amazonaws.com/minegikukovel/lirik_answer_love_myself_terjemahan.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/emma_zunz.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/worilal.pdfIn PDF document text
    • https://s3.amazonaws.com/vavale/manolotu.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/68159199521.pdfIn PDF document text
    • https://s3.amazonaws.com/kiwopusafize/ansys_fluent_tutorial_guide_16.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/23846135035.pdfIn PDF document text
    • http://bufijonewufo.onlinewebshop.net/how_does_zotero_work_youtube.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_off0000d472.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD472 4932 bytes
SHA-256: e15da0bb12f14acd80597431bb7e18e1536c1fc922f094a0c3093071af90b12c
font_01_sfnt_off0000e527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE527 10360 bytes
SHA-256: 7a381adccf7a94bf70598bf382c90cae7bba84d5276154764876ea165fad33ce

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