Malicious PDF — malware analysis report

Static analysis result for SHA-256 648e05e45680c2a7…

MALICIOUS

PDF

81.2 KB Created: 2021-09-16 00:21:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6a686ad4d72d1f49412aae63cd53cc25 SHA-1: 83b589c124cbee266ae971ad25197f4d496b560d SHA-256: 648e05e45680c2a7b42a1228a3e67ba995f4aca3b360bea632269bd60dc48958
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on disposable domains or compromised CMS upload storage, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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
  • 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.
  • 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://allytemp.ru/uplcv?utm_term=indoo+ki+jawani+full+movie+online+free PDF link annotation
    • http://newdimension.su/userfiles/file/28118279713.pdfIn PDF document text
    • http://medianet2000.net/amm_prod/image_news_popup/file/54247011814.pdfIn PDF document text
    • http://ketnoikienthuc.com/upload/files/xalekuji.pdfIn PDF document text
    • https://hankilfood.com/userfiles/file/20210905201741.pdfIn PDF document text
    • https://theptaynam.vn/upload/files/wixonebemukiwod.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/12485767025.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/rogasofafobukunupewuxakib.pdfIn PDF document text
    • http://park-seversk.ru/other/js/ckfinder/userfiles/files/51814255203.pdfIn PDF document text
    • https://www.emcp-pmce.ca/_includes/ckfinder/userfiles/files/lituzulirutotetulisaw.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/89039582711.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/26319263352.pdfIn PDF document text
    • https://sagarexpress.com/userfiles/file/58902529645.pdfIn PDF document text
    • http://le-bouquet.be/userfiles/files/latobezipotolonor.pdfIn PDF document text
    • http://momsystem.ru/public/file/8936242728.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/8155599529.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/24299104299.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137549f144ef---nibize.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d0e6996425d90c1be97d08da908818df/bilalunu.pdfIn PDF document text
    • http://laptopcuhaiphong.vn/upload/files/solotawifosu.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613baee857cca---dakogetiwa.pdfIn PDF document text
    • http://singer-island-condos.com/userfiles/files/4432280474.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/3052700726.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/46305497639.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/fomeneta.pdfIn PDF document text
    • http://bentleyplemtech.ru/userfiles/file/67881264480.pdfIn PDF document text
    • 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_off0000d7f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F3 10676 bytes
SHA-256: 9421cdd9ff91f40259a67ae81ddc55a36f37be98e94762076a1e6c54829f636d
font_01_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10875 17928 bytes
SHA-256: fba70796a2503602333145c3e1e738389f121a047ed5a50d6c71ac476621ee6e