Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf5f46e1f792362…

MALICIOUS

PDF

96.1 KB Created: 2021-07-04 04:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: c6902e0a139c8adf32e0a45c1df67852 SHA-1: 7a60bb8e01e9fa3e7e8933e24074987ad10073b8 SHA-256: ccf5f46e1f79236295f36539a4ce5633ceb5aa17b424e4c2c7740e5a923afa72
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan-like behavior. The document contains a link farm with numerous URLs, many hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. The presence of multiple external URIs and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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.
  • 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.
  • 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://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/00353987bbf78bdc56d93cb97566228f/favafosaninenimapowevuxi.pdf In PDF document text
    • https://aurorabersinar2.com/contents//files/46232437423.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/9a5520044c08c46e7f2d0d2b5aee1988/zimom.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091610389f94---25674226082.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/fesobogamekoxerokufoxe.pdfIn PDF document text
    • https://riolospettacoli.it/filesUploads/file/23579770223.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aff2ad61e8---zojozegixepaw.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/qqlqirm5aboia7bvfn2iagi3cn/vavasuk.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/e3958b168ae266da8714b283afa4ef4d/43801894947.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/46727609512.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/551f04a502996f8945a7b34ca4ff8d3c/15751502426.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/gefasadumofedinezopitaga.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/91545648246.pdfIn PDF document text
    • https://computerzone.pk/file/63386358165.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093069020757---40158769318.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ecd50311b4---vesij.pdfIn PDF document text
    • http://kaupa.cz/userfiles/file/gewovefamurot.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073e9aae304e---vifopevisuzuzaje.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160928da086702---66981740420.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/16095cf763ec96---goresedi.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/g1aq2u1eod2me79ikp38muqat5/99692017362.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b09405325a9---28297814604.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/tezaxilawarenosir.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/57029f86782990ed3248485884f339d0/nokokokorut.pdfIn PDF document text
    • http://teplospectr.ru/images/files/mejidiboregegu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=the+critical+reader+3rd+edition+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0001270b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1270B 27676 bytes
SHA-256: de3dd17eeb0a1df200329e0a0bf746b8ea67d9307053e0401e0707b31fc5aa8d
font_00_sfnt_off0000e2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB11 16932 bytes
SHA-256: 128516e38ffb2b83f638f780b1698dc53a5ae313650a9165beaaee633c68bf12
font_03_sfnt_off00015814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15814 10684 bytes
SHA-256: 54e407dcaa1d9ad20c5bd6f04742119afb8a27e04f82bf41ecb97d517523f72b

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