Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a85bbef92e8bd84…

MALICIOUS

PDF

109.4 KB Created: 2021-05-10 23:07:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 368ede9e82de1409af962b9f62268633 SHA-1: dc9760c06e18e5e2c2d7d58b1021b41ca59924fc SHA-256: 3a85bbef92e8bd840f94ad0a04825facb09b1d0ae70982b2848e470514f1840b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8845

Heuristics 5

  • 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
  • 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.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084055f6bc85---47172487526.pdf In PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/361162a105a57d3e6bf1a63d82676f49/kaxisekusumenojazilanuju.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/9vbbqd3gtnaf3ghud6vj02gff9/61226087835.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/nenifatasefaxodixeko.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/88688915514.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160839de1afd39---nanugosakiza.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/663c2fddde50934d93fd2f1b34fc847b/vokusotazedoduxojime.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/03e808dced55bdbe3ef9dc0b671719e7/86022626332.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/e8a9704d6941c0a83e4a207cbea4a894/tenij.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16084bef2862c8---14283212403.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16098a19b62724---nezapafufomi.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/9ba483037ccebf701105a41be8139ac1/74730935656.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160819aae642ed---81887471783.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c93ee67d4d---90172841976.pdfIn PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/695be8d7033b84e78a89130848303430/xamejapigarovaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=miracle+box+crack+2.+27a+loaderPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000196ad.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x196AD 15752 bytes
SHA-256: edc41fb329b5bee654331ea96b1fe473862e039b6aeee4de391d9e73050afaf1
font_00_sfnt_off00015bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BDF 5276 bytes
SHA-256: f15ca2e40019aae8ac6f476e7925a4c9ed74d7dc9c4d3fead0bf5a64bcc6ff7a
font_01_sfnt_off00016df3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DF3 12468 bytes
SHA-256: f78edb2d693a89130ab5b97efef36eefb9d393cdfb8b851c6d199606d23c9b27

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