Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ebde416778d32c…

MALICIOUS

PDF

80.9 KB Created: 2021-09-11 10:11:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2fa8c07493b30a69d5c18203182243e6 SHA-1: f9c48bc7cea956ef5a7cf20fbfc65599959585b0 SHA-256: f3ebde416778d32c0aee0ed076977311593303422b8bd3c8091900419a49714c
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, some pointing to compromised WordPress upload storage. The presence of a download button lure, combined with the ML classifier and ClamAV detection, strongly indicates a malicious intent to trick the user into downloading a payload. The embedded JavaScript likely facilitates the download or execution of this payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://riviera.az/userfiles/file/kumejukososetug.pdf In PDF document text
    • https://spcinternational.in/ckfinder/userfiles/files/nizurugefobiworijokepad.pdfIn PDF document text
    • http://dryoucosmeceutical.com/userfiles/files/vitojubokekikenibosozafe.pdfIn PDF document text
    • http://winhazel.com/indigo/ckfinder/userfiles/files/gitejetunukabu.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/8ce38885fc90680fe2fcd4e96064f894/5864175918.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/sokogavepez.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/dofajer.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/jomujavupegenabatijoxeb.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/kexagogolopudepu.pdfIn PDF document text
    • http://facyt.com.ar/ckfinder/userfiles/files/satifefawubotak.pdfIn PDF document text
    • https://novinfasteners.com/userfiles/file/54010424672.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/90529025240.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files/25565459294.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/91301168424.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/316b203eaa28ac146fb865aa062be980/sigosodilumoke.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/161377b9b10cfb---wonukiwatenafegosaxa.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/zeposorafavegofinosola.pdfIn PDF document text
    • http://xn--90aoj0agf7cq.xn--p1ai/uploads/files/24071172561.pdfIn PDF document text
    • http://flairpens.ru/uploads/file/neponabuzig.pdfIn PDF document text
    • https://mrpressconsulting.com/UserFiles/file/fovis.pdfIn PDF document text
    • http://vinhthuan.vn/upload/files/xepejafuritewagirelagu.pdfIn PDF document text
    • http://aviafond.ru/userfiles/file/vupudoluv.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/78001677384.pdfIn PDF document text
    • https://kanat.com/upload/ckfinder/files/20983029693.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/rulekerizot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=gta+san+andreas+for+windows+xpPDF 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_off0000d80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF021 17544 bytes
SHA-256: 83b2503071d290654dfcc15f5453591180013c8d7fa53c0279041d1dd33e98e3
font_02_sfnt_off00011d68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D68 10672 bytes
SHA-256: 4a96af778c0cf253fb6db0de4723b1f8b634cf9a445e8c2dac7b88c715f9f251

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