Malicious PDF — malware analysis report

Static analysis result for SHA-256 490438591ca8f474…

MALICIOUS

PDF

80.9 KB Created: 2021-07-03 18:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a07986eb2bff31074834072a280e88ce SHA-1: 764d46049c4d8a3ce6d0e4fc231340b7a11e7716 SHA-256: 490438591ca8f4748df5e9470b4556d835c9d6d300f73ae1f580d380222dadb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a malicious ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. It contains numerous links to compromised WordPress uploads and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://plafondchauffant.fr//img/user/file/92903496307.pdf
    • http://urgentcarepb.net/userfiles/file/jidigolirinefijetugo.pdf
    • https://sahyadrisevasanstha.in/userfiles/file/jufajero.pdf
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bd460e3213efd02486096dc795a5c99d/wozez.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/1789763c4e41f4782a70a6c50da107ac/vidilitimiviruxopelifor.pdf
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16084a1c9c35a0---tunivuvitar.pdf
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/3b330ffbffc7437984d2373cac5f2391/68472667733.pdf
    • http://citranco.com/users/files/50728734585.pdf
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bovubadomexa.pdf
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/rv65f7nljsbe974orj5875ujm9/41019533363.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a974ec62f05---sakibozawulu.pdf
    • https://grupo-kayros.com/userfiles/file/kigemis.pdf
    • https://a2designbg.com/userfiles/file/paxasobubug.pdf
    • http://simkoongschool.com/uploads/editer/files/gukizuwe.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/f86a372aea8f5348ae4077d5b36d636d/38940290507.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a5972393612---kusofe.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160748362a1574---77451262704.pdf
    • https://fasaac.org/temp//files/luxivaxotelivik.pdf
    • http://xn--d1achljw0b.xn--p1ai/content/upload/79542534109.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5438daca8---sevuf.pdf
    • http://banphimchuot.com/userfiles/file/tikoluzeferejatemoparat.pdf
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ad2155025---mibepaxorinubogepegake.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805808ec773---lefewix.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a114d2a1---21897664261.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-5-7/20210507021757412320.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=hidalgo+county+district+clerk+case+search
    • 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_off0000d8af.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD8AF 16792 bytes
font_01_sfnt_off0000f0c6.bin
b60f61e625dcc4ec093220a360cc8e7752ed6899f66c03fa3650ff6460b7d9f6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C6 10944 bytes
font_02_sfnt_off000109da.bin
0a4d9373ef31abbbc3fb506c6c97dbe02ab8d21522b7f73c1f1735822dcfc345
pdf-font-stream PDF embedded font (sfnt) at offset 0x109DA 16844 bytes