Malicious PDF — malware analysis report

Static analysis result for SHA-256 292435101d2688b5…

MALICIOUS

PDF

72.7 KB Created: 2021-09-07 06:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 74c7213979363eb1d98f493b0b121552 SHA-1: a97e8eb2586e0e9bb8aabefdde658f7a36b5e9d7 SHA-256: 292435101d2688b5ab6eb3cdac8ab95ba71c59f1ebf758b1711fc89a1bd633cc
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a second-stage payload or redirect the user to a phishing site. The presence of JavaScript suggests an attempt to exploit browser vulnerabilities or execute malicious code.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://wastran.ru/uplcv?utm_term=mount+holyoke+college+campus+map+pdf PDF link annotation
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bd2e8289d14---96743255829.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/7d1d37a209dffbaea40d51ca619e5d47/zinerumalofeda.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328119e1442---40595857174.pdfIn PDF document text
    • http://agama-rc.com/upload/files/bunuteruriwowuwuka.pdfIn PDF document text
    • https://turdv.ru/SITE/files/editor/file/wevoz.pdfIn PDF document text
    • https://ags-car.60km.com/upload/files/29734026869.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/paribumogolisufopupavot.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/73791606800.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/49303709356.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade6143df58---diwawifubi.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/2mstpcov36pb3kvr22s49a04t2/gaweposidazizarixepomixi.pdfIn PDF document text
    • http://bakoca.hu/files/file/gewasokir.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/a3abca6c92d20b1ac1b02032d0537dde/buvunu.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1607ada156a752---57390030025.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/33e49be32579505d772a8b088002fdec/voligeganefoziriv.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/voxisu.pdfIn PDF document text
    • http://aljazeerahdrilling.com/userfiles/files/koleduko.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/dalololukamafiguvefiwino.pdfIn PDF document text
    • http://eldorautomaticgates.com/UserFiles/file/31905569443.pdfIn PDF document text
    • https://alrashed-alsaleh.com/userfiles/files/wefofajipof.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/bususexiroguzenek.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://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_off0000b67b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB67B 17636 bytes
SHA-256: 4dae2b201f4c8a29997955f4bcee694f505254fb1547df6dc8fb76c782393f90
font_01_sfnt_off0000e3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBF8 11176 bytes
SHA-256: 46d834aa2e8ba1dc1c92c282a0343c98e18999819fb21252cd3a6aca666b2fc6

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