Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d4bc716f949c76…

MALICIOUS

PDF

79.9 KB Created: 2021-09-15 17:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 408b387e70cc96aa1aab62c14c7d3ba6 SHA-1: cb9745c96faa6fcea2222115cdb3116d47cc961f SHA-256: 69d4bc716f949c7617d4e9485ffff9372ea2890aa2bf03d99f9df583183d3c54
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://grupophi.es/uploads/files/rosojififotoguno.pdf In PDF document text
    • http://a2kat.ru/userfiles/file/81000225834.pdfIn PDF document text
    • http://nasfthr.com/userfiles/file/susugus.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614166ee68dbc---13063325976.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/3b9f90831715d6bb6a7d63916ed81dad/dofonovelipuxesegun.pdfIn PDF document text
    • https://jurad.eu/files/file/pazebomodarinob.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1613edd20240f4---zugisamijasezotox.pdfIn PDF document text
    • https://wwa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/42740924273.pdfIn PDF document text
    • http://i-physiology.ru/upload/xifopexowakoso.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/dazonu.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/ec9a7b312648ac326c9ba7ec837718ac/90928629254.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109041530457587.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/2762034457.pdfIn PDF document text
    • https://relaxbotanika.cz/ckfinder/userfiles/files/xezatosulaxaxupowiju.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/29907419885.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/ratokopazora.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/44675034852.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/7c9ec863a0cb3c30d063e1fa54c1fa2a/fapezejedujele.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/514b6ca9dec0be659867a01bfc43122c/zosurin.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/37774618309.pdfIn PDF document text
    • https://chataigne-cevennes.fr/imgs/files/54902182299.pdfIn PDF document text
    • https://farmacieitaliane.com/documenti/file/karifov.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16133d4d34a9e4---sapaxaxaxukogexejab.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161412578986fa---vobak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=diamond+mlbb+injectorPDF 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_off0000d46e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 17580 bytes
SHA-256: 5b72d38eff1a8b858a4547ed5950a02fba137faf8900a8b98a94807c6c7f047b
font_02_sfnt_off000119d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D4 10636 bytes
SHA-256: 19d8ac6b30419262bd1fe21bd5d2f096ac13a8ba3576801b5712413cbea3af6e