Malicious PDF — malware analysis report

Static analysis result for SHA-256 da26722334500dc0…

MALICIOUS

PDF

95.6 KB Created: 2021-09-01 03:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: a6842a5bd396b21c37e5d29df075f464 SHA-1: 1f4b5bc6f1396242b3d566ebd0fee9743cf583f9 SHA-256: da26722334500dc0a41cbf5562c45eea553ea4cf9a16b7df189e1a9fcd8f7371
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9985

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://pasarangroup2.com/contents//files/74586539094.pdf In PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d27bc1252a9---24105055581.pdfIn PDF document text
    • http://macabrey-luthier.fr/data/Files/juzuf.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/63219498484.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/sagijakowopasefonutokunu.pdfIn PDF document text
    • http://giovanninociti.com/userfiles/files/juzumofesexexadaganilaba.pdfIn PDF document text
    • http://chromoink.com/updates/file/98349099276.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/17162975968.pdfIn PDF document text
    • http://maxkbm.com/clients/2/28/28fcaa936e2ecbeb6c9a97ea0f1ab253/File/50156206853.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/revigirivinavamaramiguma.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/b3a9c7ef36e7f9d5377c5916e683eb6d/55582406826.pdfIn PDF document text
    • http://cuhs1981.com/clients/8/82/82ca37c076ec4232796cb58ed009bb3a/File/46349643919.pdfIn PDF document text
    • http://medicapoland.pl/uploaded/file/59180651895.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/9c1212b54d9f8a13197005f80b375c5b/derevagisebeliwekene.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed6278661ea---16001016192.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/27e38j9qo5dql20vm60tj8jr52/75001817537.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/ginumeduxavabenenov.pdfIn PDF document text
    • http://levakov132.ru/userfiles/file/92745735204.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/gamasilasuzebitadedi.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/6c191297e0514d460a6779950ed0723e/62057762295.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/mutelutenesatarudutulaz.pdfIn PDF document text
    • https://southwestlooms.com/admin/userfiles/files/30783446023.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/4c772c15554550706e175a1990e379f2/43191950968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=facetime+group+callsPDF 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_off00010da4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DA4 19144 bytes
SHA-256: 6e0c5fee842f8b7f4b7b911b6d7c160084ff4a5a8d5e42f5b1eae7f1607c5ced
font_01_sfnt_off00013f96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F96 10692 bytes
SHA-256: cf19f889e57e14f197fe999c92215c4d5f38055f58ac64f3f3caec94d83f240c
font_02_sfnt_off00015823.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15823 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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