Malicious PDF — malware analysis report

Static analysis result for SHA-256 492d1d3d18e4d0b7…

MALICIOUS

PDF

94.8 KB Created: 2021-09-16 23:56:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4f4a35d01a31f01da8386c0060b906d1 SHA-1: af393247a46f41b6958303ef5c983e5f3725d180 SHA-256: 492d1d3d18e4d0b72cc7faa2231f97dcbdbd3b7178cfcaf3f2001e3b4b9741fd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1071.001 Web Protocols

The PDF contains embedded JavaScript and multiple external URIs, one of which points to a raw IP address, indicating a malicious intent to redirect the user. The ML classifier and ClamAV detection strongly support this assessment. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/vojemovogimodaxagenefajev.pdf In PDF document text
    • https://gkscam.com/userfiles/file/68227336436.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/raxul.pdfIn PDF document text
    • https://upaspor.com/resimler/files/23791866118.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/finekomukutakozulapozat.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/fugupufagubotibupojirola.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/71971249671.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/rirakuwobifa.pdfIn PDF document text
    • https://vwb.mrv-educationservices.com/content_file/files/mamuwanipowizo.pdfIn PDF document text
    • https://studyhalltracker.com/files/file/vadesojolelarewawarerolev.pdfIn PDF document text
    • http://yieldpharm.com/upload/files/lulasoteruvugi.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210909100345.pdfIn PDF document text
    • http://www2.grupoksl.com.br/js/ckfinder/userfiles/files/33314668356.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luwakijidafenupovowe.pdfIn PDF document text
    • http://www.texaco.bargiel.com.pl/ckfinder/userfiles/files/89379484665.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/53250775831.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/64449803322.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/15366951752.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/zerujujofozop.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16133e3890700e---bazivobum.pdfPDF link annotation
    • https://www.db-ynox.fr/ckfinder/userfiles/files/97204861448.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/24879787755.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/41414837205.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/jufevoziserurixolazanon.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/difomiz.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/32341882794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=ad+blocker+extension+for+chrome+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_off00010c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A2 18152 bytes
SHA-256: 49a0211c28bce1883f5210a6e6060befe2b139c37f88ce968ac7cb546c1f0828
font_02_sfnt_off000153ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153AC 11056 bytes
SHA-256: 58cdfeddc58c2a1ed7a3687d4bf45fe651c040062cd1ba4c5b7df250bea94793