Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab5ae991d5e7083…

MALICIOUS

PDF

81.8 KB Created: 2021-09-16 00:59:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: b546fa2e32300b5f00c12db176c1313f SHA-1: d4912a33945af380e9527b732dedaaa98207c3f2 SHA-256: eab5ae991d5e7083847c76141c62cd4de3749fc724fabf3269675a19a96e72d7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojanized PDF. It contains numerous embedded URLs, with a notable one pointing directly to an IP address, suggesting an attempt to lure users to a potentially compromised or malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious intent by describing the PDF as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16141d56f09230---75701518282.pdf PDF link annotation
    • https://laps.pl/userfiles/file/86570095094.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/danojekujananidile.pdfIn PDF document text
    • https://menu2uplus.com/images/file/xezobadodiroje.pdfIn PDF document text
    • http://kahasat.cz/data/file/86316193024.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/lekelakatagukisedalilem.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/livotiridejojopavanibogi.pdfIn PDF document text
    • https://inmaabiladi.com/userfiles/files/getamokaxijizokoka.pdfIn PDF document text
    • http://rsentco.com/upload/file/refajow.pdfIn PDF document text
    • https://webmakler.org/userfiles/file/dijavekekonadujokizi.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/13411329856.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/41922965531.pdfIn PDF document text
    • https://pasationtravellers.com/root/FCKeditor/file/22059571478.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210905092018.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///86919490079.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/34531142554.pdfIn PDF document text
    • http://toyotaquangninh.org/data/dulieu/files/puxajokipeto.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/kugiza.pdfIn PDF document text
    • http://mayphatdienngocquang.com/media/ftp/file/jonoxas.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/29075136578.pdfIn PDF document text
    • http://gizmakina.com/depo/sayfaresim/file/14075151405.pdfIn PDF document text
    • http://ceresasrl.it/userfiles/files/zofipene.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/c77d02cbef403cd3d20a2d367debc837/ligowipegazigi.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/satotuwozifozomirisonupup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=pagina+web+no+disponible+android+wifiPDF 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_off0000db04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF316 17700 bytes
SHA-256: 5ed26d21860a6a8fabfe039eb39ef82642cf6425a66f1c6ad6157f6c923665d8
font_02_sfnt_off00012121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12121 10800 bytes
SHA-256: 16e77bff9283005c48e609a799be312f63cf52d8a5fba107aa77262dfe2e28fd