Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7186e1e0df4034a…

MALICIOUS

PDF

71.4 KB Created: 2021-09-25 05:23:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5cb29b5b3bea0ccd9df6aff92f86b6b6 SHA-1: f342df09db1c6d10508f165e908fb48b2b269de9 SHA-256: e7186e1e0df4034a61c79a97ade191aba8adc876ada50908868a6aa4d6ba9f6b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript, which is a common technique for executing malicious code. The presence of numerous external links, many pointing to compromised CMS uploads and disposable hosting, strongly indicates a phishing or malicious redirection scheme. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ameshamagazine.com/js/upload/files/tikefekodike.pdf In PDF document text
    • http://gsemilia.it/userfiles/files/63074518334.pdfIn PDF document text
    • https://aldurra.ly/images-editeur/img/file/48705819057.pdfIn PDF document text
    • http://shethof.ch/cgi-bin/dynamisch/file/6268480396.pdfIn PDF document text
    • http://peter-scherer.de/userfiles/file/vubijagixewobuzifipivokut.pdfIn PDF document text
    • https://www.clinicaepilepsia.cl/ckfinder/userfiles/files/pilojonixuwirekizafizow.pdfIn PDF document text
    • https://funbugs.ie/files/file/disosi.pdfIn PDF document text
    • https://confeccionesruiz.cl/UserFiles/File/topif.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613857f636f01---10235754047.pdfIn PDF document text
    • https://adikketiga.com/contents/files/xapodajopokisoxu.pdfIn PDF document text
    • http://qdjshg.com/files/file/fotijusarusuravavatajo.pdfIn PDF document text
    • https://tigaintan.com/contents/files/buxofitixe.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/7eb143754fa03083c7c015c73371c679/85840216865.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/99542361172.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/vizojejolonid.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/7e12b1644b224a5a8bd79131ec12b570/kobajaxoletezinexigajun.pdfIn PDF document text
    • http://noithatmfc.com/media/ftp/file/80389748452.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/pobixevo.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/2dc626f5f99ab2d2816223817a599af3/zomimu.pdfIn PDF document text
    • http://abaj.cz/UserFiles/File/85422951432.pdfIn PDF document text
    • http://baodieptailor.com/uploads/2021-09-16/images/files/19956039724.pdfIn PDF document text
    • http://www.puhito.hu/uploads/47282537630.pdfIn PDF document text
    • http://cukrarnakolbaba.eu/obrazky/files/91362244432.pdfIn PDF document text
    • http://www.globalnautique.nl/upload/files/dibevuzavimut.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/79562579704.pdfIn PDF document text
    • http://czerwoneiczarne.pl/files/file/rinobojikinikabozojino.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/97087806997.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=app+misurare+distanze+androidPDF 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_off0000b3a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A2 17168 bytes
SHA-256: c42c95f6f392cacefc67966166e5b557346840992a027bfab17393b267e97614
font_01_sfnt_off0000df75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF75 10648 bytes
SHA-256: 820f9b7acbd12f05d8047346c0e5a8e6e3efa0b87099f0df9950215400966d4c
font_02_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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