Malicious PDF — malware analysis report

Static analysis result for SHA-256 118b96d3793ec53f…

MALICIOUS

PDF

173.9 KB Created: 2021-03-14 02:44:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cb1e750a08e9e56b36cb561220e8d310 SHA-1: ed0e443ef924542db6760551934c8c8d25afe586 SHA-256: 118b96d3793ec53fa495a7723ca05973de7bdc965c3f7a011a9ba84712028a99
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to disposable hosting or potentially malicious domains, suggesting it functions as a link farm to redirect users to harmful content. The document body, though heavily obfuscated, contains metadata related to wkhtmltopdf and a date, but no clear textual lure.

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://seumenha.ru/wix?keyword=miguel+%25C3%25A1ngel+ludovico+di+leonardo+di+buonarroto+simoni PDF link annotation
    • https://cdn.sqhk.co/sebixodof/BYihDhb/12847496015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388183/normal_604d373be9c56.pdfIn PDF document text
    • http://it50save.info/pyxis_machine_costrmzer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422884/normal_5ff5be9fdbcc0.pdfIn PDF document text
    • http://medyayazilimtr.com/91302620718h5vgl.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/zidgfhd/order_of_followers_on_instagram_stories.pdfIn PDF document text
    • http://xozonline.ru/digatedosokozafepac0kww.pdfIn PDF document text
    • http://im-marceting.site/37441423309g87li.pdfIn PDF document text
    • http://kieverts.xyz/sudimibamedidulevokkjfn3.pdfIn PDF document text
    • http://hangookoil.ru/529841662723mgjg.pdfIn PDF document text
    • https://cdn.sqhk.co/sapasimemo/fXijeih/livopekurogot.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/bjdI3k3/56382913198.pdfIn PDF document text
    • http://gutprod.xyz/how_to_check_rock_hardness7qpgp.pdfIn PDF document text
    • http://pet-guru.shop/120459855510h03m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_5f717887e07a4c9f9d19b03e5bb8536a.pdf?index=trueIn PDF document text
    • http://lelexuxifu.epizy.com/playing_with_fire_blackpink_violin_sheet_music.pdfIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_421154986b214313bcda5c6355f1da55.pdf?index=trueIn PDF document text
    • http://tisudaxutuz.epizy.com/business_plan_model.pdfIn PDF document text
    • http://tarinag.epizy.com/flannel_sheets_sets_king_size.pdfIn PDF document text
    • https://9907981b-0bc7-4fd3-a434-169f7cdadf42.filesusr.com/ugd/575363_ddef8ca0be00464fa3e8975eab8b491d.pdf?index=trueIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_f8d035abe6bb48bdaf36de7e497e71e3.pdf?index=trueIn PDF document text
    • https://535a9070-e28a-464b-adc5-c02ad08be00b.filesusr.com/ugd/9df9d6_aade49f49a874746be820be2478b7375.pdf?index=trueIn 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_off00026850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26850 5696 bytes
SHA-256: 50903cf0ac86012bd82cef6ce598695b57539adbd0c4c1729dc8bc27946d190d
font_01_sfnt_off00027b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27B1F 14076 bytes
SHA-256: 81471b05d73c61f13ea9145babdf7c4f73bdfd4ec89ae472c85f27bdb8e85ea8

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