Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e292c2acebf9985…

MALICIOUS

PDF

74.6 KB Created: 2021-09-09 03:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 27d5324164d6b4637adeb0b210989a91 SHA-1: 7519fae9b49695c5e5dc46884a97478c0f4863c9 SHA-256: 4e292c2acebf9985cb574559b262d1a259731cafafae6d278e7f0e74c615fd47
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a large number of external URIs, many of which are part of a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://studiostocchi.eu/userfiles/files/49659967896.pdf In PDF document text
    • http://e-motyle.natura2000.pl/imgturysta/files/kegumexelilupupaliparoxo.pdfIn PDF document text
    • https://www.barefoothoa.com/webroot/js/ckfinder/userfiles/files/53195226560.pdfIn PDF document text
    • http://saringkarnwood.com/UserFiles/file/wubelero.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130bb311e4ea---jekefejiruso.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/43314701377.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/xuvupereraruvazadupug.pdfIn PDF document text
    • http://bielle-srl.com/userfiles/files/4908359395.pdfIn PDF document text
    • http://bawaconstructions.com/editorData/file/ludabogerakadutuvopiropu.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/tegudezo.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/kopuravetuw.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/35859085337.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/fetipagojipolej.pdfIn PDF document text
    • http://bortran.com/upload/image/file/20210903010802.pdfIn PDF document text
    • http://paramountswimwear.com/userfiles/files/takib.pdfIn PDF document text
    • https://austarpharma.com/upload/files/wupidazadafatofo.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1ca91d70e---86534042996.pdfIn PDF document text
    • https://3rproject.eu/ckfinder/userfiles/files/tazafiguwoxu.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/69393569484.pdfIn PDF document text
    • https://qualitygums.com/userfiles/file/78116207081.pdfIn PDF document text
    • http://porpora.biz/imagenes/imagenes_contenidos///vumifojesewedesisijadulud.pdfIn PDF document text
    • https://gifarlcm.com/upfiles/editor/files/90267805043.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090400481373499.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+to+know+my+phone+passwordPDF 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_off0000bd83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD83 10800 bytes
SHA-256: eba806681bee4818d86030a77de0d15df5f6210fe55e62a756274bf0d46cbdc1
font_01_sfnt_off0000d645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD645 18268 bytes
SHA-256: 61d16e503d6d092c388b2f89e770e3f06146667c98d5fa946c935a506e6286e9
font_02_sfnt_off0001053b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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