Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af906bcc07c0507…

MALICIOUS

PDF

84.5 KB Created: 2021-09-16 11:42:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 35f706f6adbb36f98ec5ecdc83b192a8 SHA-1: 29c0b27669d82e7fb81c5afc145d2b5bb73fa2a2 SHA-256: 4af906bcc07c050747f9cc1c63f9ef5f39a30a0b6e3c76aa7f93e3f6c14cb288
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded JavaScript is likely used to facilitate the download or execution of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 8

  • 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.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://xaydungphongphu.com/uploads/files/36950591633.pdf In PDF document text
    • http://jeanchapleau.com/userfiles/file/10158043448.pdfIn PDF document text
    • http://baikalspring.ru/ckfinder/userfiles/files/gogitegulufudinujanera.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/gazigefajareruwoko.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/jafesamepudok.pdfIn PDF document text
    • http://nikkenj.com/userfiles/file/xovitolomufukujin.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vubumaremeresolefujob.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/18884030525.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/kudebuvoferimis.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/gonatigapukizarajif.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/tukeposuzizarotadi.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/91673944936.pdfPDF link annotation
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/efv97von48ptqr8detp4818gg0/50156443234.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614173d093495---siwinafajuko.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/80751256167.pdfIn PDF document text
    • http://chia4kids.ru/ckfinder/userfiles/files/miwupekavujunikamakob.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136671a6695a---norofedavaferisenedugok.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/86185297102.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2723d27c4f42215bfd274d1dd8cea203/22404828372.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc39a47d1a---kitelomutexirute.pdfIn PDF document text
    • https://fotografski-studio.kost.si/userfiles/file/58066304217.pdfIn PDF document text
    • http://bobhendrix-law.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72816467011.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/jiwojuwivalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=justice+league+dark+apokolips+war+2020+full+moviePDF 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_off0000e1fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA13 11436 bytes
SHA-256: 07f3446139fefce78c43c503c62dd5f58a537319aaa8e26b5e44aa5c980bee54
font_02_sfnt_off0001150e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1150E 18144 bytes
SHA-256: 2bf2f5e6dd99b23b5d8f36e02eb1a0cbb5987cf6b98d051eefe8045b3198efc8

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