Malicious PDF — malware analysis report

Static analysis result for SHA-256 06ed03e6c66b74c6…

MALICIOUS

PDF

71.8 KB Created: 2021-09-01 17:17:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 36a0ee0167ca300260538a6094812bed SHA-1: 16e0ce37f02a926f8cf5435c08f5814214287808 SHA-256: 06ed03e6c66b74c6f099ad18616b0fb40b1f85cd5682f5ac50c57733711d1c42
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links, a common tactic for tricking users into visiting malicious websites. The heuristic 'PDF_IMAGE_LURE' specifically points to this behavior. Multiple URLs hosted on compromised CMS platforms and disposable domains were extracted, suggesting a campaign to distribute malicious content. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 71 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://ge-mak.com/files/74371873060.pdf In PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f56c208edd---12519555529.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/75584599608.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/3be4b1c9ddd9412dcc5a51a26896b6eb/16073513281.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/kirevixokefufevozakezuro.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607599106da7b---17036349764.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/39127785775.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160870bc7233ae---64647089254.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16077e71e8ddb2---34640039768.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/66153536568.pdfIn PDF document text
    • http://www.bluewhaleline.com/image/upload/File/6098379137.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/cb7b38bf747c562ebb777c2d609a6f6e/savuwafafisedet.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160984011da1df---97021123601.pdfIn PDF document text
    • http://nappsa.org/userfiles/file/zigatamovapob.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1609c1f774636c---22623075094.pdfIn PDF document text
    • http://toyotarenta.net/FileData/ckfinder/files/20210717_07A6F05CD9685846.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8c3902d5f---87275958238.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16124257ee07f5---65314218784.pdfIn PDF document text
    • https://vestol.bg/files/file/75287338787.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/hbvjghf0ulrroc6h19q9f0t5c1/fixezigub.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/f495f6bc0cb7a7d52fe5a614d1f5d679/87735384690.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/subos.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/vijoleroreporajurixara.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=main+component+of+fungal+cell+wallPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DE 14096 bytes
SHA-256: 9e73473f2e7e3691f7bd6bf59c815028b15858432c4b2b0c1a0742cdb5f3d11f
font_02_sfnt_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 10732 bytes
SHA-256: a22ab478be013402e24d19c301f896d4a588a64eafe9a0590c7bd27cd2787aea

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