Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3689553930b1a77…

MALICIOUS

PDF

204.7 KB Created: 2021-08-11 17:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ed5dd3de7aa7930af437810ff4b54ec8 SHA-1: e6fe405cc867aa3703b1e1d13b634b9324585135 SHA-256: c3689553930b1a77c6feab21b91581390d6a111f93ef7328fd66ece782c2a1dc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, with one pointing to a raw IP address and others to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely responsible for executing the malicious payload or redirecting the user to the compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9703

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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 http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/5699414633.pdf In PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/e2s9ugsg1sds58kibbpsrtdf2e/vijafelegute.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/35862106002.pdfIn PDF document text
    • http://1970fchs50thclassreunion.com/clients/1/19/19770213778af891f1b13fa25f964f50/File/babudamojemetalupilovak.pdfIn PDF document text
    • https://people11people.com/uploads/File/79636201934.pdfIn PDF document text
    • https://nattasampun.com/upload/files/zizuwavilajirunix.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/4fc468dc8194ab38b4da74210d20e31c/wupejilowu.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c2fc6757c---gokevewon.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160706c8902e99---67911870884.pdfPDF link annotation
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/af7itfli3t2j59e1oppqj9ej00/zupinugizasuteki.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/tawewof.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/vi59ve383bp4eoab0kvcaafsc5/niwefukigagogose.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609cd8cfc2447---liwadaja.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/82105061921.pdfIn PDF document text
    • https://bushregenerators.net/userfiles/files/fomidoriravotopiweneniles.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160edf59d78e9d---tabilabedel.pdfIn PDF document text
    • http://anoh.net/pds/userfiles/files/96044482015.pdfIn PDF document text
    • https://aptitudeclass.com/ckfinder/userfiles/files/53279907194.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc104969e4---41615816083.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/3bb733b322e2831a38ca33ef4406a683/4915249602.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/19501095334.pdfIn PDF document text
    • http://longbienco.com/js/ckfinder/userfiles/files/torabegowevabanega.pdfIn PDF document text
    • http://micronforgacsolo.hu/UserFiles/file/bulabepemese.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8ac79273b---kodipimer.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=noir+desir+le+vent+nous+portera+guitar+chordsPDF 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_off0002c46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C46E 18276 bytes
SHA-256: 085a24c7d262a1f5d11e7f07fe1ed8d49cfa10c095c5ca277e04b6fdbcf2dddf
font_01_sfnt_off0002f375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F375 10936 bytes
SHA-256: 60d6c08b290a7c8f591212e2d53e60f2a63d9fac4b20499c442f9dd2c51b7b29
font_02_sfnt_off00030c95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C95 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1