Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d501cb58282acbf…

MALICIOUS

PDF

80.6 KB Created: 2021-09-11 04:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d255761f03c690657ee1bf1fab7dd9d2 SHA-1: 83b6c8a1ab5385cf6432d5a22177e16af0bf77e2 SHA-256: 0d501cb58282acbfda4801f630d00e3cfbdd3a737347b0b22087007605e9fab7
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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
  • 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.
  • 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://a-swiss.com/upload/userfiles/file/32418564006.pdf In PDF document text
    • https://alkathirilaw.com/userfiles/files/85412989355.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/67414197897.pdfIn PDF document text
    • http://tw-jia.com/uploads/files/202109081815553123.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/bikarugunawixiv.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/mekidebenizemefot.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/92225667809.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/gasalezagomaxarajesu.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/rowajejuwasefutitedozikav.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/futijoribofewi.pdfIn PDF document text
    • http://videocycling.info/files/file/77205073771.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133bb89cda8d---50656976363.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/9054103285.pdfIn PDF document text
    • http://esistore.de/userfiles/file/mizakefevu.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/2228369318.pdfIn PDF document text
    • http://kqcme.yiaiwang.com.cn/upload/files/mopusujesisav.pdfIn PDF document text
    • http://abwfinlay.com/uploads/files/79471142470.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc60c84d51---51117507311.pdfPDF link annotation
    • http://candientuvibra.com/images/file/44676860132.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/xofefe.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/161398c3f3915f---bujonuperudoguna.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/mewexulur.pdfIn PDF document text
    • http://studioguagnoni.it/userfiles/files/28778640669.pdfIn PDF document text
    • http://www.firstpages.eu/app/webroot/files/userfiles/files/xovitapojodotita.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=gardenscapes+mod+apk+new+versionPDF 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_off0000d453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD453 18416 bytes
SHA-256: 29e71342bf0454dfdd742bd85f279615f664d7d3249d797725fb5ce4aa854a92
font_01_sfnt_off000103d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 10812 bytes
SHA-256: 376538bf8a434eec1f410f676a4638cd782c03e2ff61750b1bde8dec43c153d5
font_02_sfnt_off00011cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CD2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1