Malicious PDF — malware analysis report

Static analysis result for SHA-256 e29cf6bedb24e5b9…

MALICIOUS

PDF

85.3 KB Created: 2021-09-04 04:47:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 19c16567d73ed1bc6dff968758c46edf SHA-1: 032b6ca868b1150af679986df1c82313c6a92568 SHA-256: e29cf6bedb24e5b973c37a34090243a659722bdb03193adedd805a2b9f215af0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised websites and disposable hosting domains. While no scripts were explicitly extracted, the nature of the PDF and its embedded URLs suggest it is designed to lead users to phishing or malware download sites, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://huntic.ru/uplcv?utm_term=splendide+2100xc+manual PDF link annotation
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8s4bb7l6s6233v3dvs3kq3fndg/mumirojobanemumanolufur.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/vegazaxukejazuxiwufekuseg.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3f6c35ec50---gaforaxadulilaropapiz.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/nilonozelebubelolosi.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/rawazinosebuwunovawa.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607541068ff36---32426757862.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/76313463453.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1610fcccbb3a02---gekubiratek.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/4f7a88fda19a2ade9471ab9545293039/61192667135.pdfIn PDF document text
    • http://onelove.cz/file/5317054734.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa08748eba---22454337257.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/1a5f2c6b4f4af0d51d81fc9143660d32/wifimona.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/limafokivaw.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/0jt4ragjivnuoevppobchqtvqf/21560098150.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/93830170091.pdfIn PDF document text
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cba2616c9a---fipiwiwotelebimilawaja.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/b8e7c331bed40ec8c1a61b828988434a/71575326412.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/tosukokotaletu.pdfIn PDF document text
    • http://starke.ca/clients/84205/File/sijefuvotitakasekili.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/jobarokewonoduduwobiboga.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b4a0714680a5561a662f0b0365c6990/55080387166.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/46930333993.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_off0000e4a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A6 10760 bytes
SHA-256: 756aac6fb964c33b5b26f44733499b41f9909ffd3f8bdad7ba75c6ef1b7e8241
font_01_sfnt_off0000fd6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6E 19248 bytes
SHA-256: 465ccc17bc5be931930332937a40ae76fefee9b38bb42450afef5cebcf2d7469
font_02_sfnt_off0001303b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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