Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ec54b4092e929d…

MALICIOUS

PDF

75.0 KB Created: 2021-03-06 03:47:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 0243e368f3b513e49b5cc111e8ce6b5f SHA-1: 1bc4a8db52c71f2d2689e3e134ddded1078b4069 SHA-256: 75ec54b4092e929da2e1f0dc8040ce41a0200e106ead6584729d30a5ab509e4e
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one pointing to 'mezovuduw.ru', which is likely a phishing or malware distribution domain. The document body, though heavily obfuscated, appears to be a lure related to a common search query, suggesting a social engineering tactic to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/wb?keyword=how%20do%20i%20open%20my%20sentry%20safe%20when%20the%20battery%20is%20dead PDF link annotation
    • http://chestlune.online/81353425750xsh9.pdfIn PDF document text
    • http://kwini-fini.online/7642972867228kpb.pdfIn PDF document text
    • http://boviriso.22web.org/25689649541.pdfIn PDF document text
    • http://gbo.guru/studio_apartment_floor_plansrowah.pdfIn PDF document text
    • http://faceit.su/visafefifaj3nbcz.pdfIn PDF document text
    • http://nakrutkavk.site/elementary_differential_equations_william_f._trenchw8sff.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9574212-a828-445d-9ef4-b94a66039684/film_location_a_river_runs_through_it.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d55703-0133-4c53-8734-098eba22d5fb/lelubaronejumuju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ba59af4-7cca-461e-b999-e20d7a3b78f1/11749333317.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/35358464965.pdfIn PDF document text
    • http://dogirajuwuxo.epizy.com/19472078832.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/8053697040.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/android_mind_games_review.pdfIn PDF document text
    • http://lavodusepigixu.rf.gd/chutti_tv_ing_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/894c6eaa-bed6-4598-aade-3f4815525b68/test_ancient_civilizations_in_world_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea07ca7-3aab-4dc7-b0b7-74840eb66c21/72036676663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35450baa-28c7-4fa3-a327-e3dbf9c709aa/58953155251.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d2199fd-45f6-44f0-a7aa-4f3cd53a6b48/why_isnt_my_ge_universal_remote_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08aeb17-3e97-43f5-9a28-006b96f2805d/love_poems_for_her_from_the_heart.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/54392018824.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0cf30ef-d538-43d6-81cb-255d83c3bc67/kekoranivevuz.pdfIn PDF document text
    • http://nozozuwovore.atwebpages.com/zudelumikomuxiruvonokaro.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/beatles_songs_violin_sheet_music.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_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 5544 bytes
SHA-256: 78b267798b78718500572b1a60d67a7baac1f9d72645c0a5b8a0a65e6449a8da
font_01_sfnt_off0000fba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA1 10052 bytes
SHA-256: 74c0e0ad2a31474fe2eb652fcb9ce35310059fa0850d5877b724ae422d719707

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