Malicious PDF — malware analysis report

Static analysis result for SHA-256 603d68b3abd2ea96…

MALICIOUS

PDF

86.7 KB Created: 2021-04-05 23:03:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a86ac9eb1b7c65d969cafcaf6e8eee4b SHA-1: 2249000db0ee3b8a9bdbae03bdf0d3faf6620f7d SHA-256: 603d68b3abd2ea96e286a4f6815089550120253ee4c62df6b93a039e2d552449
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, and one specifically linked to a search term for hotel bookings, suggesting a phishing or scam lure. The presence of external URIs and the 'link farm' heuristic further support its role in directing users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=cheapest+hotel+booking+website+in+india PDF link annotation
    • https://cdn.sqhk.co/pemejurove/DJVZjce/kemibawu.pdfIn PDF document text
    • http://dombitarf.ru/44935959855khht3.pdfIn PDF document text
    • http://parralax.net/59424675020v4lrk.pdfIn PDF document text
    • https://cdn.sqhk.co/ranotigu/jcXMehi/2419441079.pdfIn PDF document text
    • http://nikepexi.22web.org/avery_dennison_labels_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/jbusHMA/faxidad.pdfIn PDF document text
    • https://cdn.sqhk.co/pakevetuzi/j6jftDB/semajigufazuluvagomikudum.pdfIn PDF document text
    • http://videohost.space/dungeons_and_dragons_gifts_2020viv6j.pdfIn PDF document text
    • http://sis-paypal.com/tazekaludefufpngg2.pdfIn PDF document text
    • http://tgesheff.xyz/giorno_theme_sheet_musich7nb5.pdfIn PDF document text
    • http://life-news.tech/transformational_leadership_in_nursing_pros_and_consrevsd.pdfIn PDF document text
    • http://ch-redirect.icu/94916883208jethg.pdfIn PDF document text
    • http://italiahot.fun/best_advanced_excel_course_in_mumbailhyzg.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/zge7Gid/super_mario_bros_3_game_over_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dizavinizekabos.rf.gd/how_to_get_lint_out_of_dryer_trap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2236ee-da93-4b63-9a38-53b44991e192/fasikubotulupa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f36340c-fde1-4f56-97bb-2ce3fc1f7a4b/voviferezaxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fab8730-f9ac-484d-a1b7-b2f9418b63a6/jegivamulozu.pdfIn PDF document text
    • https://s3.amazonaws.com/risisipajole/23256482265.pdfIn PDF document text
    • http://ralorepozariti.rf.gd/jisede.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e623fa85-5939-49f1-9f26-62afea9b82d4/g_shock_g_7900_strap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b84644bd-4d26-45e0-9391-3b63827f07e3/bubipomodadugufelojudama.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/72513834748.pdfIn PDF document text
    • http://nitewofa.rf.gd/11558731909.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_off000113e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E9 5324 bytes
SHA-256: c0fcb302a4ac1bc8d5029d88121dacb1bbbab5d06e7518ca309a826c1f8c9157
font_01_sfnt_off00012609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12609 11472 bytes
SHA-256: d0906d7ffad65e18a6ffccd0a85cc0bc4ce5fcd5c2641b1b0f7a8fe18ebde47e

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