Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9c96d5ac7998c37…

MALICIOUS

PDF

90.2 KB Created: 2021-08-14 22:31:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9ec05cebdecac089ef83aab0a6aa21df SHA-1: 7566a0a1b7a3f278a4c73c51790de26a0fccc678 SHA-256: e9c96d5ac7998c37f28eb619a810b8e699477ca201a4c90ce106484e2458fdbe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of multiple external URIs and the overall detection profile indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16079255552980---fubizasovexumawabanut.pdf In PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/g27j4bpjn54vnu4m5r34nmveb3/45330406868.pdfIn PDF document text
    • https://langumeistras.lt/i/File/2836380823.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/14afa20162a9341f8c30d490443a3d8d/81746820344.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/98f40af34d1ccf7339c25b98fe111291/vibobenegovudebininexuni.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a2651cc09ce---rebazuw.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/zavopawimolenamatekobiz.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/b343c5f776d80e422138a67f64b85c0e.pdfIn PDF document text
    • http://ttlh.vn/storage/ckfinder/files/sowiwavejirekisufa.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16114e59eb9575---tutiligevaxujapopori.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb717be46f---12899295004.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/f13f5e0d30742d40d46b7b6c9b425f61/54859168140.pdfIn PDF document text
    • http://biomehl.com/images/content/files/80302882164.pdfIn PDF document text
    • https://kimcert.org/E/file/ludijagegekeron.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8ec0fb846a16aca12fa3c74bb8a34adf/fabirowupato.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/79205737257.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/251321455027.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/57295323465.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/161014a5a02d99---3879227963.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021062105173673499.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/numoroxinesaxuwuf.pdfIn PDF document text
    • http://gramercygrand.ru/files/file/gowuvelaravokez.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/k3ou48uglp2ko16nr01uh0t9im/vubidufuxurikitususivem.pdfIn PDF document text
    • https://www.abandassociates.com/ckfinder/userfiles/files/70293359440.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=ejercicios+de+convertir+decimales+a+fraccionesPDF 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
font_00_sfnt_off0000e4ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CE 17960 bytes
SHA-256: d1b3ec2a163fc41ded43690d9382b9fc901932eb8fe65be7c0adc553362641ab
font_01_sfnt_off000112d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D5 10816 bytes
SHA-256: 441423180d1711351acae237387c2b058b5758714e1de1bfe380c1e9d2df5af5
font_02_sfnt_off00012bb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BB6 16200 bytes
SHA-256: a2c6eff7b27d8739ee43f205b2c0ec2222043169a45d9ef0a0f2171d175e79cf
font_03_sfnt_off00014175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14175 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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