Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe872a41442c522e…

MALICIOUS

PDF

86.4 KB Created: 2021-07-17 14:49:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a7ec66787771e3cc090f9949b49439c7 SHA-1: ed185728a42f3c50fbbd8438458bce5ab230af30 SHA-256: fe872a41442c522ea3011c739e791e8043d3bd26240881cdd2edad0742e613e0
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to compromised CMS upload storage, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of numerous unknown URLs further supports the hypothesis that this document is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bea9e286c---47872924980.pdf
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/xoludiwaboni.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4c10a8d1c185acaea9ad95fef1ff885b/bifazuwujibina.pdf
    • http://lamelove-zakryti.cz/userfiles/file/magijonujaboxiw.pdf
    • http://bud-drog.pl/userfiles/file/86752103506.pdf
    • https://geneolock.com/locktactyuma/userfiles/file/pawuveteserova.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/aaf6be0810a62560f60fd9825f3efcd7/zumapakefapeke.pdf
    • http://schodylux.pl/userfiles/file/74144801353.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094572b1634f---61824403983.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084920d57f4e---bawexeb.pdf
    • http://studiosiriosrl.it/userfiles/files/vivibet.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1e122d43f---69039838880.pdf
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/92882e1375e623e70949001d144d4243/61542134312.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085a3d3a89cb---zamupufusivufapezuxir.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/3334112040.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16088860e7991a---17634825046.pdf
    • https://quaint-house.com/nurirusubexasajulatawup.pdf
    • http://aristosaigonhotel.vn/uploads/files/20830259931.pdf
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/c3074b6fed8ebe15089e2f7c3e599eb0/10092597394.pdf
    • http://alphanaturehk.com/userfiles/file/23906267474.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/tjd4tt9ab89e2r5pde5pkhsn2a/85516813384.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/tegegizoju.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/v367eebq21d78u2c26p0o4lqjo/bunamesoxogumuzavixu.pdf
    • http://enjoy.sk/editor_uploads/system/files/63838283191.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=if+sodium+levels+are+low
    • 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_off0000f088.bin
3d4a7d22f3ecfe8a7d2eb4ce35f9da67c5fcd7ee7688e332637f6c4a73552a14
pdf-font-stream PDF embedded font (sfnt) at offset 0xF088 16832 bytes
font_01_sfnt_off00011c2a.bin
d9c000db60637c33516d3bce2cb470f7c75899e5a135ce1fb1748f1d7728b8dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C2A 10516 bytes
font_02_sfnt_off0001342e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1342E 16792 bytes