Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7b44e965693ffd…

MALICIOUS

PDF

72.4 KB Created: 2021-03-14 18:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e72bd5de7efe74a47d029848f7db3df2 SHA-1: 77a482bab7757c294f2e696b8f0278466fe639bf SHA-256: 8b7b44e965693ffd12d03b88d79867c063f46da471a9aa5ffd263b4f6317cc63
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, suggesting it is part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords related to 'Economist' and 'pdf', likely serving as a lure. The presence of external URIs indicates an attempt to download further malicious content.

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://druttle.ru/award?keyword=economist+14+july+2020+pdf
    • https://static.s123-cdn-static.com/uploads/4466659/normal_60054e3fb142c.pdf
    • https://static.s123-cdn-static.com/uploads/4378170/normal_5febf36fb73df.pdf
    • http://reawolt.online/bujarekasenatabomup0pslm.pdf
    • http://civiliscmq.online/jojawovosifeliludihaxa6.pdf
    • http://trylait.pro/credit_report_security_freeze_equifaxqqw2r.pdf
    • https://cdn-cms.f-static.net/uploads/4458837/normal_5fd12ea986a64.pdf
    • http://it50life.pro/82709215820ert9b.pdf
    • http://frut-tree.site/english_as_a_second_language_certificationiy0kt.pdf
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fd0970b360b0.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/jaxesabi/postpartum_depression_management_guidelines.pdf
    • https://uploads.strikinglycdn.com/files/f0096c84-dcce-4f43-829e-efe9d561966c/lojodov.pdf
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_44e85fe73c524880abadd04f0d9e96dd.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3b071185-c91e-4a88-bd5e-cd848e284d8d/how_to_service_a_harley_davidson_sportster.pdf
    • https://s3.amazonaws.com/gizonukorad/fipela.pdf
    • https://s3.amazonaws.com/pipaneku/rokojunowifemirazovu.pdf
    • https://s3.amazonaws.com/pewebopufupe/3977795125.pdf
    • https://uploads.strikinglycdn.com/files/a14b7cce-fe8c-4903-bdff-94a6197fe272/how_to_put_plantronics_voyager_focus_in_pairing_mode.pdf
    • https://c12206d3-8957-4ff5-956d-313580f361db.filesusr.com/ugd/9b7d8a_5f4cfb7dfbca40fdae7d31b993584104.pdf?index=true
    • https://0502d5d0-a0f5-47b8-bc1c-644c46e4e431.filesusr.com/ugd/6cabbb_6a3d0bf033c04e46b1996828389003e0.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e3af9583-2fe6-401d-a714-586472c60708/jedisepiduduxi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd6e.bin
2d4855e62e5612d17e9b1efbddf5914f2ec5a32d9979a20009273ad73d6769fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6E 5544 bytes
font_01_sfnt_off0000f065.bin
7007ed1591a888c03a41ffdd7d8977162a0d10af0dc158b6d8f4dde561f36f79		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 10536 bytes

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