Malicious PDF — malware analysis report

Static analysis result for SHA-256 f983151376903da3…

MALICIOUS

PDF

59.7 KB Created: 2021-03-19 23:15:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7930dd080ee9ba563f0c58a5ddab0dca SHA-1: e5b2c726edd6eafa45374eb1e8eae780e08dd431 SHA-256: f983151376903da3caa36a17830333b6c85fbf167a7a376cb8c6c4b1a1ff371a
154 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for SEO poisoning or phishing campaigns. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external URIs suggests the document is designed to redirect users to potentially harmful sites, likely to download further malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7841

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://jumiwimov.ru/award?keyword=thrombocytopenia+in+dengue+pdf
    • http://stingeksoj.online/samurai_warriors_4_weapons_guide53pln.pdf
    • http://fesurowejo.mywebcommunity.org/ways_to_prevent_climate_change_at_school.pdf
    • http://rameautbxy.space/91071656193he9dj.pdf
    • http://sefobadivura.iblogger.org/ap_seminar_performance_task_2_rubric.pdf
    • http://xudogiborijum.66ghz.com/barozezimiwova.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zezevefo.rf.gd/windows_10_shortcuts_deutsch.pdf
    • http://magakawigola.epizy.com/aerobika_instructions.pdf
    • https://uploads.strikinglycdn.com/files/fa0eb87f-ba5b-4ad3-9cfa-5e1fa1360673/tokyo_ghoul_series_list_in_order.pdf
    • https://uploads.strikinglycdn.com/files/26a185a7-8abe-4b23-bf14-52a59d11987d/master_of_the_universe_toys_list.pdf
    • https://uploads.strikinglycdn.com/files/e30fbab3-84ea-4544-955f-070fff85f975/how_much_do_substitute_teachers_make_in_colorado.pdf
    • https://uploads.strikinglycdn.com/files/f25f2fa6-c19d-41e6-b5b5-3285457f03ea/gufilidoxewepoduwu.pdf
    • http://zonatitusajobo.onlinewebshop.net/suratalimosodafa.pdf
    • https://uploads.strikinglycdn.com/files/7977760e-d4f0-45df-941c-fcc188357092/puxenigiribilusupojomiri.pdf
    • https://uploads.strikinglycdn.com/files/a5cb5671-2358-4e0f-b416-8eac8454c977/82977498759.pdf
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_013dddad99734f4ebd99acb0add406e7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/483302b6-1849-432f-b409-709fc781428c/cirrus_sr22_service_manual.pdf
    • https://5e6d3f51-9b35-4a29-baf4-1f036254a461.filesusr.com/ugd/99a8f2_f28c9b1ab0c2437291ec13b54fde99a4.pdf?index=true
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_738456edc4bf426ca1c68349713f6ef7.pdf?index=true
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd6.bin
19cdcb079f4c38e6b0ee0cda00856b0772c678d4cbab0038f3131a578c25a121		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD6 5432 bytes

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