Malicious PDF — malware analysis report

Static analysis result for SHA-256 41f5460b57add86c…

MALICIOUS

PDF

74.0 KB Created: 2021-02-02 14:34:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 4c2bdc8103e9a6453082be1860482bd9 SHA-1: b4a035e09459c7d192af94df42d08debface31c8 SHA-256: 41f5460b57add86c65e49f47295bb0ef06120a896c65b47cd5244aac2f08ff95
104 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing or malware distribution scheme. The heuristic 'SE_URGENCY_LURE' suggests the document content attempts to create a sense of urgency to prompt user interaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/aws?utm_term=conklin+de+decker+report PDF link annotation
    • http://blacktea.space/29811568326qvl9r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369166/normal_5feedecaf2ed3.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/kig6yjd/space_captain_galaxy_shooter_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xexanodu/gLWQzib/hammer_nail_gif.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/1BUNieJ/75718142354.pdfIn PDF document text
    • https://cdn.sqhk.co/kagelemovo/atzhijg/rubogibefagojoropipumemot.pdfIn PDF document text
    • http://boldly-grow.com/fujitsu_digital_annealernl9ol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458827/normal_6005551b20ac9.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/rerinago/new_cutting_edge_upper_intermediate_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/madabadaba_makhadzi_song.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/printable_copperplate_practice_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/rts_24_bus_schedule.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/android_10_samsung_s7_edge.pdfIn PDF document text
    • https://s3.amazonaws.com/zodawanuror/violin_sheet_music_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/product_catalog_template_excel.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_off0000e41b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41B 4648 bytes
SHA-256: b484418b04c081dfbad3f3b148053bbc791d40e355a3e83bcbdbf1233d16292d
font_01_sfnt_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 11524 bytes
SHA-256: af94ba1d18bd0d2b89f59fac3c9c4eb014df5db9360ff27e858a0ace64d8a70b

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