Malicious PDF — malware analysis report

Static analysis result for SHA-256 f177472d704b383b…

MALICIOUS

PDF

78.3 KB Created: 2021-03-26 06:11:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 458eb02e5bf7074cdb014d4967a73acb SHA-1: 5a2a2caa3477698b380fd600dab334abcc1f829e SHA-256: f177472d704b383b4229d5e90573e5b4a3893e0c57b59d1655dd2b67f6962f2e
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. An external URI pointing to 'golowaki.ru' was extracted, suggesting the document's purpose is to redirect users to a potentially harmful site. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery attempt, likely using a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/award?keyword=centripetal+acceleration+derivation+pdf
    • http://paktum.pro/4440744761w27pe.pdf
    • https://cdn-cms.f-static.net/uploads/4409818/normal_60563a4840977.pdf
    • http://pegejoruvufiron.sportsontheweb.net/763615078.pdf
    • https://cdn-cms.f-static.net/uploads/4367005/normal_600afdf3e823b.pdf
    • http://dokumenty-kiev.online/is_arris_a_good_router9ps28.pdf
    • http://pijojavoto.mygamesonline.org/58747762329.pdf
    • http://rupiwot.getenjoyment.net/masifikikonixumu.pdf
    • http://neo-tp.ru/chhatrapati_shivaji_maharaj_vastu_sangrahalaya_report3kh3q.pdf
    • https://cdn-cms.f-static.net/uploads/4488135/normal_602708ffa7a6d.pdf
    • http://homeolimp.com/e_myth_revisited_audiobook7a2zq.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a451ab79-a44a-4cb4-a02b-fb7e2a477f50/62639517954.pdf
    • https://uploads.strikinglycdn.com/files/7e6724ec-bec0-4292-ae2a-9acdb82cf7e7/waxugorobejoso.pdf
    • https://s3.amazonaws.com/bejikefowu/benuminenutu.pdf
    • https://s3.amazonaws.com/tokit/tatavu.pdf
    • https://uploads.strikinglycdn.com/files/7155b203-bb32-4d2a-83fd-94c573760faa/rci_2950_dx_for_sale.pdf
    • https://uploads.strikinglycdn.com/files/3fc2c681-0666-4525-aa0e-ef7fc88ca710/how_to_write_your_college_application_essay.pdf
    • http://tatesit.myartsonline.com/cantoral_liturgico_nacional_de_espaa.pdf
    • https://uploads.strikinglycdn.com/files/ef62a934-3fb8-45f7-bb18-2536584d6182/zivogepunawizag.pdf
    • https://uploads.strikinglycdn.com/files/9f85119c-b293-4a78-8bdf-e947785df392/what_is_the_coldest_it_has_ever_been_in_florida.pdf
    • https://uploads.strikinglycdn.com/files/3c784b73-40db-40cc-9ec8-f685d8d41602/lagevadofugototevo.pdf
    • https://s3.amazonaws.com/zaxuledo/google_apps_admin_user_data.pdf
    • https://uploads.strikinglycdn.com/files/0560ffa4-9b10-43c4-a4ba-b85c9f382b97/hostgator_wordpress_hosting_vs_web_hosting.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_off0000f26b.bin
d086a89a5963dcf55bdde50827fbbc6e17f2f19dd9fc8c7757978137c3bbc6c2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF26B 4936 bytes
font_01_sfnt_off0001034a.bin
962e14c0f09c8cf31068fb6e33f22576c35e1419586c43124773347e46b730ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1034A 11960 bytes

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