Malicious PDF — malware analysis report

Static analysis result for SHA-256 510ebda1a196f634…

MALICIOUS

PDF

89.8 KB Created: 2021-07-15 22:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 37fc6f4f67e0e7321fe67ac5a3618cb2 SHA-1: ff3220c57cc7f7d4390c0bf856d8a51888602109 SHA-256: 510ebda1a196f6342be004a93ab29606cf4ca61e0bfda734bd8348687f761bf0
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm hosted on multiple compromised websites, suggesting a lure to download further content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a common tactic to bypass gateway security. Embedded JavaScript streams are present, though their specific function is not detailed, they likely contribute to the malicious functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://aiswaryamatrimonials.com/fck_uploads/file/garevabezawopifi.pdf In PDF document text
    • https://webmakler.org/userfiles/file/gogewurolu.pdfIn PDF document text
    • https://feltshoe.com/userfiles/file/zubizekevutaxaxusu.pdfIn PDF document text
    • http://thesnowmanicecream.com/ckfinder/userfiles/files/99158855883.pdfIn PDF document text
    • http://france-ex.com/images/blog//file/99245801781.pdfIn PDF document text
    • https://nhakhoaanphuoc.vn/uploads/files/32595562528.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/lisutirapivoniwoko.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1609c52a2c4800---85028492346.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/4il2br34fq32gr346k71suss94/pedofivogupulosowajose.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/135f2358d9a254eecabf37aaeb27f368/toxudifikisijatuveledi.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/01a80c9740821f55b54130cceb84eaa4/xufafusot.pdfIn PDF document text
    • https://www.propertyadvisersaustralia.com/wp-content/plugins/super-forms/uploads/php/files/1e661cda47573b52e2e88108ef8866c6/zigopubenuzakomu.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/67003d9d18eb4a92b9d322b9054cc46a/42140122110.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/8372945991.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/ruvetivobuwov.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/gijimogupezupolujopu.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a51c135580d---fijavumonijepuginikegud.pdfIn PDF document text
    • http://matsusushionline.com/uploads/files/xowukole.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160adb48b94d76---59702471121.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d047c30c7d---vawisudipuperesiz.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/annb5vabkpmmmr5u79nj23ln1j/41981345735.pdfIn PDF document text
    • https://ocw.tw/uploads/files/65283205619.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/wopalidokupuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+to+delete+all+photos+from+icloudPDF 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_off0000f8f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F9 10956 bytes
SHA-256: 2dee1f1d18c97a18424e074f5f1d6f97400af750a12df42a0b0a9670a788d54e
font_01_sfnt_off0001126a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 18844 bytes
SHA-256: a4f914cf5226d56b94a2962958b5afc86ba7164774bc71bd83ced2daddfa4740
font_02_sfnt_off000141f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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