Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cebf4141e5ab933…

MALICIOUS

PDF

87.7 KB Created: 2021-09-08 10:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd6082dfd4a2b57f9c67a6950b91c0e1 SHA-1: 4e99563cbf32422a48b8f68e262f189aa4d79bf0 SHA-256: 3cebf4141e5ab9334e4ba949a3c023f045d8d9dc0a05d4901bf64fce1d9bb8ba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure suggests a lure to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://synerhu.ru/uplcv?utm_term=evil+genius+book+pdf PDF link annotation
    • http://aclamerica.com/customers/CMS-IMAGES/file/pirofolatawatakufugeg.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/28b473dd6526baee8a1ff6449077c8c5/paxidu.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/dulonivuvomegevivepi.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/lapotegemeli.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcaa20648c---18553461381.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/13j2urslsnenh947ospkmdq20a/jowezutofuwopedudobigijek.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/b8c0c2311261f9651dc7bcd8a1adcb01/vosorakugerivejatosawujur.pdfIn PDF document text
    • http://valeneighbors.com/userimages/40919225788.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/0vku9tlcrmdpti9o1v6p2klhnn/zilodonele.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607f14ca1a22c---90811825932.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/619743d723934dc8dfea0fb7af87b84b/62987527978.pdfIn PDF document text
    • http://blsfamilyreunion.com/clients/1/11/11e20eb1c47c3498ff3e66fc1941d138/File/94136014536.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/17246731800.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/62710168782.pdfIn PDF document text
    • http://tecsun-moscow.ru/docs/file/7875954757.pdfIn PDF document text
    • http://asfalon.com/__files/file/gemujepisazodaritosugel.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/56978778373.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d53e34c29a6---luroladuxulasaweduxo.pdfIn PDF document text
    • http://crystaltrade.hu/data/file/1525281369.pdfIn PDF document text
    • http://heibldr.hu/FCKfeltoltott/file/30237324847.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/33091714607.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/lufobazozu.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/39147705379.pdfIn PDF document text
    • http://studiolegaletrotta.eu/userfiles/files/36217213759.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_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A63 10692 bytes
SHA-256: 6b13023bd1e372b34177493365be8f568d744c21aac47d2375456ad29f0d2e1c
font_02_sfnt_off0001228b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228B 18384 bytes
SHA-256: bc47f86ad2c9dfe53e063d7711826d0239c1e5edbb0ac00bda34f0d4c5c5257b

Open this report in the interactive analyzer, or submit your own file for analysis.