Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eecf9e28c4a3b4e…

MALICIOUS

PDF

75.2 KB Created: 2021-09-26 19:57:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 5b35b9bf267267dd7486669fd0002fb4 SHA-1: bb69a7b557c1eab88f72c919acc23e1ddea7f4e0 SHA-256: 9eecf9e28c4a3b4e3ad40c503c6750ad4808da25791f72c15f378a175c546059
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated, preventing a clear understanding of its specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/161332d8d8c1df---magifup.pdf In PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/161436b37bf227---bogesenupipolikemugabuza.pdfIn PDF document text
    • https://parlagame.net/calisma2/files/uploads/wefipifatuvezisobazi.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/5792739290.pdfIn PDF document text
    • http://upservice.expert/admin/ckfinder/userfiles/files/zexudemabubusakibudidabes.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/377e7e08e3b772cdd8d7fc67ba13fab1/52753218978.pdfIn PDF document text
    • http://master-vin.ru/files/file/28435513593.pdfIn PDF document text
    • https://penmypoem.com/new/admin/uploadfiles/file/13851061951.pdfIn PDF document text
    • http://nato-denkmal.de/uploads/file/xevojenesajigowivokode.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1612f55dd1b4f0---93131730090.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/tizivilupemunudepipopida.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/39832979320.pdfIn PDF document text
    • http://hkxhjfc.ltd/uploads/files/20210906052612.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/161438651362c6---27602221027.pdfIn PDF document text
    • http://hndgyl.com/v15/Upload/file/20219425122149.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613379c520f07---94898437060.pdfIn PDF document text
    • http://s2group.pl/userfiles/file/somuwuberifezezojagaguwag.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/4630769926.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/jivebilobowobiguge.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16138c509b27da---welav.pdfIn PDF document text
    • http://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/506057985.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/43247948927.pdfIn PDF document text
    • http://hawaii-resort.info/images/blog/file/dobeno.pdfIn PDF document text
    • http://bolt.fo/public_html/userfiles/files/pesofofuwa.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/texawitorufuvedamoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=solution+halliday+8th+edition+vol+3PDF 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_off0000ba46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA46 10812 bytes
SHA-256: 8dba25d151e5cf91cd0cc53affe354fd2c879719095ab51973438c79e238af2d
font_01_sfnt_off0000d332.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD332 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eb44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB44 19756 bytes
SHA-256: 3f350bb0ccd394f6d4995e5ad65a0f1a564753d7cf8a406eea060048d450692a