Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc64cec13a3574a6…

MALICIOUS

PDF

236.2 KB Created: 2021-07-19 11:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5c79901966f95068b78830ccfd0d69a2 SHA-1: f499df7b6be61c77a0d40c90b3a37e4c2786a007 SHA-256: cc64cec13a3574a6c4c64cc8f6a538f8f8e635903d397f01bf10f92755e52b33
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains multiple links pointing to compromised WordPress upload storage, indicating an attempt to host and distribute malicious files. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The document body was unreadable, but the presence of compromised CMS upload links is a high-confidence indicator of a malicious distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160867fbd15644---70383818196.pdf In PDF document text
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16093b0bdbb334---45279606531.pdfIn PDF document text
    • http://safeabortionnepal.com/userfiles/file/kapidapudeja.pdfIn PDF document text
    • http://hncastlecable.com/d/files/24015062849.pdfIn PDF document text
    • https://asiarsolutions.com/userfiles/file/nimagerijumenesifejim.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/15c3f9e960820716ec024efa965ce2bc/pulas.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16072ea3528265---nojaninobovovisuwuv.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16082024560207---10550881822.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f8373d8542---fitidolusutix.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/1053ae9e1093cea43cb657e01723f246/56048480129.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c04005ab77c---gewevukofemubo.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098aad01771b---51386462523.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a176c3e879f---26135288857.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/94236a7973426f7da8660dd6995eb9ce/72773542577.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/jovegodetokawivodanos.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8n38up4jf2b8gkoce6rfu8i0il/51868000945.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c992b256ed2---lifitidowo.pdfIn PDF document text
    • http://castel.lu/userfiles/files/87763608313.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e56e524186b---32023232502.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/2632de4f4306159af61a88699c039c3d/71495270626.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/11739316132.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/povesu.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/d8eec696ad43eaa223a5550d640ecdc1/gemadamezali.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c89f49ea829---dugemosizomimuwusewake.pdfIn PDF document text
    • https://parkettworld.com/upload/files/patixonataribisodarifevuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=tales+of+drangleic+modPDF 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_off00033fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33FB6 10684 bytes
SHA-256: 105248feb8b28a1d32286df41245f7daf0891eea064f4b93c88a6dd8be23605e
font_01_sfnt_off000357f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x357F2 19400 bytes
SHA-256: 3d4b785d08823f5d878ec5229e3e6b7d64d245508e53d7cdd57fd1546b22a10c
font_02_sfnt_off00038955.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38955 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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