Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb04cc11e2923058…

MALICIOUS

PDF

91.9 KB Created: 2021-09-06 01:44:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bad09f114f9b7277c31989573603df6e SHA-1: f3f79686926e3af5322dd0b6343fb65a6e7cff34 SHA-256: eb04cc11e292305868e68a0b6e538cfc3b2949870744647f5fab7a95f1821927
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm or phishing lure. The primary URL, 'https://chcial.ru/uplcv?utm_term=guitar+solo+licks+pdf', indicates a potential phishing or malware distribution attempt disguised as a search result.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://chcial.ru/uplcv?utm_term=guitar+solo+licks+pdf PDF link annotation
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161124e771fc3f---luxuzoxebevojozob.pdfIn PDF document text
    • http://scbczy.cn/up_files/file/20210705_165209.pdfIn PDF document text
    • https://tongdaidoanhnghiep.com/app/webroot/upload/files/virurunax.pdfIn PDF document text
    • https://roomart.uz/ckfinder/userfiles/files/jofunoros.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ec6f2aff6fb89772fb82f5f1ffb9b024/8259747003.pdfIn PDF document text
    • http://starlightcelebre.org/clients/4/43/43e9139217482d7666ce300faf566241/File/nirelunozuforenuwuvimaxe.pdfIn PDF document text
    • http://itkaufmann.com/images/fckimages/file/nudide.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/11617872516.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/u5io5psnlt2pon89or3mbd0sg7/10744352248.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160783e1ae557b---96926263159.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d0a404fee---kofuso.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/63971388274.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6f10773d3---bipuxeva.pdfIn PDF document text
    • https://dgssu.com/upfolder/e/files/20210812174218.pdfIn PDF document text
    • http://brmhn.com/userfiles/file/20210524044636_yrrw7m.pdfIn PDF document text
    • http://johnmichaelharrisonlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70338078110.pdfIn PDF document text
    • https://hostingyuvasi.com/calisma2/files/uploads/kegiwupe.pdfIn PDF document text
    • http://cuatro-pr.org/sites/default/files/file/turejidid.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-21/20210521210505162497.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/e5bab3e537e52e326141b1efb0fc58d1/wutefubokegupizudemigifox.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/bvo40108neiqq42kpp5m3tcuc3/gusuvamulesetifadu.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/98c5832e4f6651d4bc473028ef99b49d/kidavukifutubaneranoxazu.pdfIn PDF document text
    • http://www.gleason.com.au/application/third_party/ckfinder/userfiles/files/28376346873.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/vifavuzisenemaluri.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_off0000fe6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6C 19524 bytes
SHA-256: 91d67d6bf0bc68d1ca15eac5c0a5cb6179e2fe2e435b56368f09355013fbd1b3
font_01_sfnt_off00013195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13195 10608 bytes
SHA-256: 3e47d7777f9ea20a8e05a05382756d21af43f1d897574472aec7ee8b3d850d9f
font_02_sfnt_off000149fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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