Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98901019fbbf8b7…

MALICIOUS

PDF

83.5 KB Created: 2021-01-23 23:23:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2a74f7bd83af25d0a103046142c6a6a3 SHA-1: 1f54f7dc4d091525620a7bb581216546d939f9dc SHA-256: b98901019fbbf8b706a5ad20c1b350155871840d596b29745954007f3f2d8a12
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting, suggesting a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://druttle.ru/123?utm_term=properties+of+carbohydrates+pdf PDF link annotation
    • https://site-1229446.mozfiles.com/files/1229446/90481811097.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421360/normal_5fdd10124adaa.pdfIn PDF document text
    • https://site-1166653.mozfiles.com/files/1166653/7346681481.pdfIn PDF document text
    • https://gifaxopolipo.weebly.com/uploads/1/3/0/7/130739444/muvuvofo_fasifazivavodop.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461751/normal_5ff7f4a5f1b48.pdfIn PDF document text
    • https://site-1239377.mozfiles.com/files/1239377/bulldog_ii_pitching_machine_manual.pdfIn PDF document text
    • https://site-1168324.mozfiles.com/files/1168324/giroxapidije.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_5fd2cc00a0eb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378628/normal_5fd15a6768da6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465151/normal_600c7e1b45c7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451766/normal_5fceba86c2ed6.pdfIn PDF document text
    • https://dotofufodil.weebly.com/uploads/1/3/5/3/135313806/getabibegiwojupog.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/fununimijeruda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480148/normal_5fea1e881cd38.pdfIn PDF document text
    • https://jagavovukivotu.weebly.com/uploads/1/3/4/8/134881855/7589537.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zidumive.rf.gd/zitaderumilu.pdfIn PDF document text
    • http://zisoramemib.rf.gd/yahoo._co._uk_email_settings_for_android.pdfIn PDF document text
    • http://moxawaten.epizy.com/aarariraro_song_hd.pdfIn PDF document text
    • http://nefijojutofad.rf.gd/kuginonilofusomeju.pdfIn PDF document text
    • http://wetafemef.epizy.com/famadejusijotibexaz.pdfIn PDF document text
    • http://xonelamurojili.rf.gd/self_esteem_and_achievement_motivation.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C1 5456 bytes
SHA-256: 60ca5f5b5d1ab41f28b78f48950b80b4cb0eb505e4d9d78e196dfe53824604c7
font_01_sfnt_off00011747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11747 11768 bytes
SHA-256: 344910546572acb199f767f3e60c4857797b0b7b216483891346534af7cef3bc

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