Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd2180158b929f21…

MALICIOUS

PDF

92.8 KB Created: 2021-08-14 04:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 01346479085b765a340e9ef86ee069ab SHA-1: 0c6e07fecc71980f2c13db807ecbc2b0f87c0c3b SHA-256: cd2180158b929f211d96ad1b6e4ed3188c9e5edcfc2c04d0423d8def3dc5af92
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pixomot.ru/uplcv?utm_term=realtor+nc+raleigh PDF link annotation
    • http://lexuspolymers.com/assets/ckfinder/userfiles/files/82919792490.pdfIn PDF document text
    • http://aimecostruzioni.it/userfiles/files/75813267273.pdfIn PDF document text
    • http://olimpic.hu/ckfinder/userfiles/files/sasinifadizowabonebo.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210813042955.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/anad8qvh5ialfuvu2etvtqb4k5/36471821488.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/okbilds7ckf11moj4c45q245dh/rakifuzoxevulolozetukid.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a76f331f8be---kubonetila.pdfIn PDF document text
    • https://aihr-iadh.org/uploads/FCK_files/file/kutawuleg.pdfIn PDF document text
    • https://signika.pl/Upload/file/62795528714.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/9113320833.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd4ea44c93---47402399780.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1215a30a02---62435730611.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe2a3ae096---33297394964.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/66528112000.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/74532289991.pdfIn PDF document text
    • http://www.rpv-drachten.nl/files/file/21646268598.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/xujijavopatulib.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/49571122385.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/59912169326.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/33b84ea1e59a6c856b288f3e267840b3/varof.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/tb6cig83o9ckdfteugrbf1qt16/47387923413.pdfIn PDF document text
    • http://alvitraders.com/files/40053320249.pdfIn PDF document text
    • https://santa.sg/images/users/00000000/files/98128872738.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/2c4f2e5c955de3d4127b791a67810027/tulaxikiraxowesanipivat.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_off000108da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108DA 10388 bytes
SHA-256: 0c571d0c8d6a1aaea2651a5732619b30f9592c515532395843239db0c7cb511d
font_01_sfnt_off00012041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12041 17316 bytes
SHA-256: e9d0cbecacdb3165ac1e6657bcc1e1610e0946797f86e086762d49ef85b73ae1
font_02_sfnt_off00014daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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