Malicious PDF — malware analysis report

Static analysis result for SHA-256 5060d0f7423798fa…

MALICIOUS

PDF

98.1 KB Created: 2021-08-10 02:26:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2b391178209c36ebfd18cf22958b888c SHA-1: 1c3181ae0a48712c8a0caf73e860f1ea3cfa24a6 SHA-256: 5060d0f7423798fa3426fc0d6cb5c4fb7665adcd83848208cdc2eff42b2d8e2b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious payloads or redirecting users to phishing sites. The ML classifier and ClamAV detection strongly indicate maliciousness. The embedded JavaScript likely attempts to download and execute a second-stage payload from one of the numerous external URLs found within the document, many of which are hosted on compromised WordPress sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec9584b159---kumikaxaxowo.pdf In PDF document text
    • http://btc-ltd.com/upload/file/70621282027.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f0fcdcd70e---votavirobiji.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/mpdif2rhingee9egiuuunt6hoo/72092862793.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/cb3bnd7c9icbm2fk229c0vq2tr/67867489190.pdfIn PDF document text
    • http://lakshimi-kaatsu.com/user_data/packages/default/imgfiles/gipefipe.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/0d66f4486c1160fa7a8889d4e019d73a/dokuwakumolonoroto.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16105132486cf2---lavupumunapafomepix.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/0e3efa251df67389a83b609b7e8721d5/91164068893.pdfIn PDF document text
    • http://lhs75.com/clients/46937/File/wizetetav.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/lefovasix.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba256ceac5d---84391317544.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/wuramotikiwawevixidu.pdfIn PDF document text
    • http://an-ocn.ru/ckfinder/userfiles/files/4799786804.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/87essunh51okj73ddoasd9usj8/51792791142.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/42750252389.pdfIn PDF document text
    • http://monroe74.com/clients/871877/File/43560136225.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/vavapajajafizejovijo.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/sabigefujuzenepopavosi.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/79807715613.pdfIn PDF document text
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/f144d9a87ecedfbf32315fbb3be922e9/90861059465.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/lalisiwuzeku.pdfIn PDF document text
    • http://ginzaramen.us/uploads/files/wutopemadinanetofobuzizob.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=what+is+an+example+of+a+nonliving+thing+in+an+ecosystemPDF 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_off000118d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D5 11104 bytes
SHA-256: 902e57c38fc27fe09678a55bab968972e031309a87b3bbe62d6ef95046ad8fce
font_01_sfnt_off0001329c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1329C 17436 bytes
SHA-256: ab16b184819f97dccb2ed2d3d81f708a9bcd212c94d9f07ecbd084cb4b2dc828
font_02_sfnt_off00015fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FC9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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