Malicious PDF — malware analysis report

Static analysis result for SHA-256 5efd6b02fac185c0…

MALICIOUS

PDF

94.3 KB Created: 2021-06-30 20:28:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6c58dcd0a51f4814adb09c6f9acb3689 SHA-1: 253a57121d1170a0fa9e9ccd4ee3ee4a7f05c448 SHA-256: 5efd6b02fac185c02e36c6ed68e15de87d19b5bc16bca2f30469b78b754906e1
156 Risk Score

Malware Insights

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

The file is a malicious PDF, as indicated by ML classification and ClamAV detection. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The PDF is structured as a link farm, likely to evade detection and distribute payloads through various compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • 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 http://edanieltour.com/FileData/ckfinder/files/20210528_376E1B54B314E9DB.pdf In PDF document text
    • https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afb4fbbff7---59357342831.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/dqi1hdlngqr7un82pc62g8vabr/61134943638.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ba2c9d0d7b6---9097635512.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/351f9464e4e65803cc6898ac8f880cf1/ganit.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf59e4b9ee---kidexew.pdfIn PDF document text
    • http://www.themixchange.com/userfiles/files/seliludawe.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/908d8faaa0684f0512f8954e68d18ae1/42929597722.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1606fcf94cd03b---majobiti.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/80949676442.pdfIn PDF document text
    • http://cdseoulps.com/uploadfile/fckeditor/file/risikefokadexiramopiki.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27da87a18b---wojobutovulumiwenuvika.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/ferizira.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/23cae29424070078b5e0e9b52b1ed617/rexemowuzizudodazamupogo.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c3d496ca323---56788630816.pdfIn PDF document text
    • http://valaptop.com/ImagesVA/file/77440651402.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/ditoa8po46oqo5hul4k10adr91/kelajowufibolamuxo.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609afde50ca82---14782727098.pdfIn PDF document text
    • http://diamond6ranch.com/userfiles/file/kerazudizawififik.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/i5c2hgb0cpp9nh3cp0j4dq9i67/zagalumoxik.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c1f00f66f---73018599128.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/21a901b2ec82437edccb1bb411c47a51/81228650576.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaa39035d4---32209067458.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=download+dear+mama+by+tupacPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000127a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x127A2 24048 bytes
SHA-256: 0f9e3818752cf00afb1bfc6a335de1affaa72bcb33e579b05ec90fdc48ef154e
font_00_sfnt_off0000e1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E6 17680 bytes
SHA-256: 7cadfefe9938c48abe08af93ffac16e2970309f7decae1ad9f1c0194b8d90f58
font_03_sfnt_off0001529b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1529B 10856 bytes
SHA-256: 2fe8e0f38344e677781c8a0c39b2e6c450b8bd48f51292f5d51b59c4f5dcd1fa

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