Malicious PDF — malware analysis report

Static analysis result for SHA-256 44a0e09b4267f9d0…

MALICIOUS

PDF

89.3 KB Created: 2021-09-13 18:27:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c0383e79215cc49ce6b1530bbd47ee34 SHA-1: 2a3a2e3cd33689cd782dc85916367340ff34e904 SHA-256: 44a0e09b4267f9d071d65ebfa66288d4e23b6e7357ff7fff5a0e0c09fed777a9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16139f6ec5c514---gazapifax.pdf In PDF document text
    • http://warmistore.com/userfiles/file/nufadukifene.pdfIn PDF document text
    • http://tlxzkj.com/uploads/file/021336054063.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/kaxonisa.pdfIn PDF document text
    • http://gndpta.eu/news_objects/files/bopazatakalor.pdfIn PDF document text
    • http://em-mould.com/ckfinder/userfiles/files/68248625693.pdfIn PDF document text
    • http://www.lovebliss.tw/UserFiles/files/voretulu.pdfIn PDF document text
    • http://www.mediagrand.hu/data/editorfile/40659187697.pdfIn PDF document text
    • http://xn--b1agpbmdtf.xn--p1ai/upload/file/33400364128.pdfIn PDF document text
    • https://lesura.net/userfiles/file/26396066144.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/d01cf15ed81af310e44016f3709899b9/bipilofowisuxonigozos.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/41257661600.pdfIn PDF document text
    • http://ayurveda-shiatsu-nice.com/upload/files/zejoxuju.pdfIn PDF document text
    • http://gld-lining.com/user_img/files/8679561097.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/6989681856.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/89061699904.pdfIn PDF document text
    • http://ourpreferred.com/userfiles/files/nevedunojevilakofo.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/taroxewujivejuvexiji.pdfIn PDF document text
    • http://korytnica.net/data/files/nomokuzepobubarabek.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/movuguzemofi.pdfIn PDF document text
    • https://sapsda.com/SapmaUserfiles/file/84619618667.pdfIn PDF document text
    • https://limsurdua.com/contents/files/88388391260.pdfIn PDF document text
    • http://sewakendragroup.com/userfiles/file/60166466992.pdfIn PDF document text
    • http://thienminhgroup.com/uploads/userfiles/file/58965525641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=joker+full+movie+watch+online+freePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001117f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117F 17596 bytes
SHA-256: 60107b788ea4ed19c359ce19fb1733b03e61d7e0c441ab9e5e05c528f7d4c958
font_02_sfnt_off00013ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EBE 10768 bytes
SHA-256: 8dc239bf472e29224d45e0cfd21104d1093d9ce206a4d2655232c6864ed3a9bb

Open this report in the interactive analyzer, or submit your own file for analysis.