Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ac92d1462aff0d…

MALICIOUS

PDF

89.4 KB Created: 2021-06-30 12:32:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c243c492f9f216b69ec3e5a0fc6e5c7 SHA-1: fe095d26722d3d5606624af8f9ce599f4c9567f3 SHA-256: 96ac92d1462aff0dedc76eec19155cdddebbbafb8115420d0ab883001ded9a9b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF 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 hosted on compromised CMS uploads and disposable domains, suggesting a phishing or SEO manipulation scheme. The embedded URLs likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://synerhu.ru/uplcv?utm_term=855+toll+free+number+lookup
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/40f5034c881c73146a01c4eb4c9f2b65/62382074316.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4d9435c17---lazenusa.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/06aafd21350a11f680f7eee11717da36/gumuzofakofepez.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/14cbc6dceccaa54ddbb625536ad3d88f/kanebolirowivi.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a102054b5a3---54117086404.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/b5bb8da6aaa601efa5212f77131783ff/wagubapivinujajo.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae947807367---94068376477.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a43890a5c5---22244685237.pdf
    • https://nanyangtextile.com/userfiles/file/rowigirozewugemideju.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608a3513ac101---gikovon.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0aa2a0bda---7988215679.pdf
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/6ef82f81fc03f29f16d485d641c04b56/22253213130.pdf
    • http://anaminfo.com/attachfile/file/kidifadufoxek.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/33e0df25f7ff06c21a6101f829a19273/loregomo.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-4-29/20210429041500351919.pdf
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078087cef95f---pokedozabomibumaxodeziz.pdf
    • http://tbm-mova.by/images_from_html_editor/file/junejadapef.pdf
    • https://proxus.nl/file/nolatevozuxenasinij.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/4338a57ccab9791811bc0f4caa254bd5/5369656470.pdf
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/2aded6f647523cb32010233178c86aa1/xupixub.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad20434a3ef---6886066323.pdf
    • http://archinfo.ru/uploads/file/76379647442.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/21785c322f2178b1249fc64f0580658d/96749359899.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091ff9895624---temas.pdf
    • http://s292376414.onlinehome.fr/datas/imgmail/file/bofitonovexawovesara.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_off0000f9b1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B1 16792 bytes
font_01_sfnt_off000111c3.bin
1cec2b3529ec7033b01bba86b70b373c8df5c0050e12d547b025a210c01303cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x111C3 17448 bytes
font_02_sfnt_off00013fcf.bin
37bc912af11cb696f5cde506a3a30b51684a3e4527f6c31f41f5be9a972fac08
pdf-font-stream PDF embedded font (sfnt) at offset 0x13FCF 10676 bytes