Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd54f29b0e8691f…

MALICIOUS

PDF

83.5 KB Created: 2021-09-19 17:53:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2fde2df335633ec21717b9b34eb2288d SHA-1: c8feca3e73a9327f9ac25a14d0504e78f92a594b SHA-256: afd54f29b0e8691f34cad1c63f31e90a98f624d920c04e4ec88083f08ad671a2
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm pointing to multiple domains, some of which are hosted on compromised CMS uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities or initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.pelicanfinancialnetwork.com/ckfinder/userfiles/files/wibujanimukujojiwomupixu.pdf In PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/ortkcovdok18l1rcenspiihp9a/januwefetanekevuga.pdfIn PDF document text
    • http://diakmelo.hu/ckfinder/userfiles/files/71396022027.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/38658640778.pdfIn PDF document text
    • https://a-1commercialkitchenservices.com/ckfinder/userfiles/files/35264767963.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-17/20210917135028583542.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-2/20210902082716377120.pdfIn PDF document text
    • https://www.stnedu.com/ckfinder/upload/files/riwofazupavelunupesa.pdfIn PDF document text
    • https://jung-yeunjang.ch/userfiles/file/mobanuma.pdfIn PDF document text
    • https://kmkmekanik.com/upload/ckfinder/files/71905506683.pdfIn PDF document text
    • http://budapesticukraszdak.hu/userfiles/files/lozidaponasabiteju.pdfIn PDF document text
    • https://jungleflightchiangmai.jungle-flight.com/Uploads/files/womubopexejud.pdfIn PDF document text
    • http://kdekdyjak.cz/data/forejuwoxidilo.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/38204133777.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/16985467477.pdfIn PDF document text
    • https://relans-nn.ru/images/docs/file/bosoniluziditilobi.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/23092462452.pdfIn PDF document text
    • http://elskenecologie.nl/files/veburepabanipevix.pdfIn PDF document text
    • http://skomi.ru/img/files/file/pevoriguj.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/wemoguwiguxejajes.pdfIn PDF document text
    • http://massvt.sk/editor_uploads/system/files/josimujofowugit.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614480d3761a4---sonolapazepilezu.pdfIn PDF document text
    • http://www.motocams.cz/ckfinder/userfiles/files/bipomotutigifarunimuxozi.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/7970efa169d24f6703a32221f51fd14f/97446443573.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=disney+hotstar+app+apk+downloadPDF 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_off0000d94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94A 20780 bytes
SHA-256: 8c459001c350e8ca633047f4f91bd0a5e36b93fb50b56dbeb2094f509b118f64
font_01_sfnt_off00010efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFB 10784 bytes
SHA-256: 438a38799f07ac6d541166681bbc145fb753c5e1b392487d58403b239c0c223a
font_02_sfnt_off000127d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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