Malicious PDF — malware analysis report

Static analysis result for SHA-256 d016fab6e7e9614b…

MALICIOUS

PDF

84.2 KB Created: 2021-06-27 06:51:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ab4c0af6f952a9bc8bc558ce052ed57a SHA-1: 43c9e909d71341a8a1b60c29fd29cb909f9d9851 SHA-256: d016fab6e7e9614bdeee9a2977c896d6cc7f388961b1f504e4d7d34dd58bae53
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were directly extracted, the structure and URL patterns are consistent with PDF-based phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9962

Heuristics 6

  • 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.
  • 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://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace8980898c---462604605.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b299a1518e0---16461228377.pdf
    • https://bakotech.at/uploads/ckeditor/files/suwifupasemusifipuv.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/3ad57eea522fab3dfb2abf593fc64fc9/popavaxipezila.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8be5c8b65---75565986340.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/36d6eec63759ff01a539db32597848b4/nixejuwuge.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160846875d652e---vetamejujedosuvebowifer.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/jnio9n34khvijgdnv884bsarip/74917718870.pdf
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/io57p92lvp38ponbq03l0r9dr1/99056023908.pdf
    • http://beepost.vn/upload/userfiles/files/vekitepotipadevelujumafi.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/id1qfj30agd6h5c2inmmrq11n0/pilanowujefapaxexu.pdf
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/eba4620071424c6b27af229e7697735d/75620816345.pdf
    • https://propiedades.net/ckfinder/userfiles/files/15224006021.pdf
    • http://atek-ent.com/upload/file/pemogusufivo.pdf
    • http://learningkey.org/userfiles/88090429868.pdf
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a23f5328200---vokinoridifivad.pdf
    • http://cdmatik.com/uploads/file/dafepujuruvukibeg.pdf
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/f5frdchs89hj1rufn3qurrsiks/sirom.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/e206cdde8ce8a9b1e29d94baf9024810/nirewanami.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2341c10a3---19246993673.pdf
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/78d695213e706ba48b66a85e7fa2ad63/62688124332.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=competency+management+system
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607909db64bc0---86784369851.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e759.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE759 16792 bytes
font_01_sfnt_off0000ff6b.bin
1a9286d78c856db9a5f141c0e0cfc18027eec1c06b37c90c00617382db3324ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6B 16952 bytes
font_02_sfnt_off00012b8c.bin
77cc222b2604d9f2b7126cc672e412888a94ed20d8ce92f95e70d8b4ba900493
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B8C 10624 bytes