Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc2e9f865c0bfd4…

MALICIOUS

PDF

98.3 KB Created: 2021-06-30 21:28:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c6bf971476f1d53f3ddf0468b16494dc SHA-1: 527208df27a463a06d540ecb9fa99a8ce44f3fa7 SHA-256: ebc2e9f865c0bfd49c7c7ec745c4d5ea4f874577e1198f509ce7b7c6b177e24e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. These links are likely intended to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

Heuristics 6

  • 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.
  • 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://yoron.net/up/files/82322279831.pdf In PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b736457d748---javutegokelejajukefuv.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3e48d68fd8---budiputag.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16096397524af1---53749064985.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/tanibako.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/aef5e1c0933e301c52bae6fea4b66796/75538718302.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/57912217276.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ae09f74809b---28893848612.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a035cef909---labipeg.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/faef85c4f87740621be677174b5160ad/50408150644.pdfIn PDF document text
    • https://rzfmuhasebe.com/userfiles/file/sifivasizurofunudadewa.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/2c2211551742786cdbcd7941f74e044c/dilikupaxew.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f57754d394---teduxi.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/31e2e1058e73170a05ac98cd8916e383/81230785802.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/kirotemixopaxuriziri.pdfIn PDF document text
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/14c84462089b7d7340767c056ea1cb7f/11778037755.pdfIn PDF document text
    • http://chinajnbt.com/images/upload/File/14143976599.pdfIn PDF document text
    • http://red-persimmons.com/upfiles/editor/files/31684506003.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/778f2ab3cd962d6c348ede54f372fa8c/56414868264.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/fuxejopinefabekekujen.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/36745868664.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/gibuvolapusiw.pdfIn PDF document text
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078adcb3c89b---83191216498.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=juggling+meaning+in+tamilPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000e077.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE077 18924 bytes
SHA-256: e9b65e74330054e2b038cbf1dbf2a704072df83527d0c27084f0bbff01a4e0ab
font_01_sfnt_off0000ff75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF75 23860 bytes
SHA-256: 51124bb69c873eb3c2667ebec151525ba883760dc38aea97d616cd17a0441fc3
font_02_sfnt_off00013a3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3E 4444 bytes
SHA-256: 947824a2abc57ddc74ce2c4bba44cdeacdc14a37f017b490f3f34aceedf737dd
font_03_sfnt_off00014ade.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ADE 10156 bytes
SHA-256: 0eb50efe178c50dd5b988fdee4ae0151b77e0d93b841df825fda69f14be4a49b
font_04_sfnt_off00016187.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16187 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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