Malicious PDF — malware analysis report

Static analysis result for SHA-256 60561187f137c2dc…

MALICIOUS

PDF

80.7 KB Created: 2021-09-01 04:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dddb8600764a44357157cef88296c5c5 SHA-1: 4e71ec76294c8e589aeed56eb3aa4deb81895e41 SHA-256: 60561187f137c2dc555a9ba515dd24addf1ea3bd0ef2dc49882c4e577a835865
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URI heuristics and compromised CMS upload links further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://smidgel.ru/uplcv?utm_term=apa+7th+edition+student+paper+running+head PDF link annotation
    • https://rentcar888.com/uploads/files/202108130807108851.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/3h6gup38qbadljdt2fo44daov4/xikunezisezumagudi.pdfIn PDF document text
    • http://amongelite.com/ci/userfiles/files/87219431228.pdfIn PDF document text
    • http://allasclub.com/campannas/file/57287144934.pdfIn PDF document text
    • http://ghinelliarchitettura.it/userfiles/files/12785584123.pdfIn PDF document text
    • https://mtmhomeschool.com/mycms/uploadedimages/editorUploadedImages/file/1702222622.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/91736828876.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080df5f4c8f2---saper.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f4997daa7---97941435882.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/78163822484.pdfIn PDF document text
    • http://safarang.com/basefile/files/78988199083.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/89987420801.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16090158a585dd---62023416811.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/47135033601.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/9818588b21ac0e8049dfd06c80725ad5/52150884756.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/42056556811.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/29780338782.pdfIn PDF document text
    • https://o-dance.com/upload/files/jemunoxisiduvezorodugon.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160847c03264a7---99054194454.pdfIn PDF document text
    • http://ash-graphy.com/userfiles/file/zuwixotazuzinuwesipelib.pdfIn PDF document text
    • https://greenturtleproductions.com.au/wp-content/plugins/super-forms/uploads/php/files/4682b0a69ee9581bf9ac7a5f63574daa/tatumusugowizano.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/basekomosawufar.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160abc9527be1f---6293386541.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/kabufikevotifowonel.pdfIn PDF document text
    • 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_off0000d4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F8 17472 bytes
SHA-256: 5cdfe4f521dee77e89afc215e818cc4da56be82d55dd9a8a862372ccff292aa8
font_01_sfnt_off000101de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000119f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F5 10756 bytes
SHA-256: 325f9cd3792a5de43cc4f196ac5acaa478801be2c2f815baf42062f6a61a6779

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