Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce43f451a246ffbd…

MALICIOUS

PDF

84.7 KB Created: 2021-07-03 00:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 8db337c038adec7d5c6a66ae8405bd84 SHA-1: cd7cfbd09086f31888b41020b6a7e7b71b4f32e6 SHA-256: ce43f451a246ffbd45dfa4062c29deec2730cd586a46f3a7d99b6f89f9ca4c7b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://queure.ru/uplcv?utm_term=accelerated+math+7th+grade PDF link annotation
    • https://binarbaidservices.com/public_html/userfiles/file/jenopelezimutalunu.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/23707413579.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f33017b51---88626573860.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b252efce3de---mefemagapekiwa.pdfIn PDF document text
    • http://saxonsaxtonfamilyreunion.com/clients/f/f6/f6d0431f970e0833b0867c311dafb132/File/93497158824.pdfIn PDF document text
    • http://antwerp-reefer-tournament.be/argt/files/40232819166.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/muxizewuxavizolabaga.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/b971adab516dd77c42eb5763475a4651/venerukisilapasedon.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/fuzifibubegukivik.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/9td58cu3v87coqlnv5jlmtlng3/14761057749.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/o81739es7ebqgo2n76uh1bc5pj/bafupekalutiji.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/abalagevenaf.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/15a3a9ccac7c4390c5549b92559b0ba9/guvukodarekigofef.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d18afe2f45---sasotosufojosomedawupu.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/39394324132.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/27o2u3db76429qc1ekm7phsgk9/87371845940.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/tobevutubabebupixe.pdfIn PDF document text
    • http://3e-recycling.ru/app/webroot/filesfiles/86442719955.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa418f9a3---pomijelo.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609413302b7dd---jezazazarufiwoxu.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/34140934603.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/f534c5558fbef1273eb9a87fc5fb97b2/wenovewip.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_off0000e606.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE606 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1D 10364 bytes
SHA-256: 3400b0b3fa73e2b64d65c03ab05e9bfe02e538df6208a29023efc784a8bdc882
font_02_sfnt_off00011567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11567 17736 bytes
SHA-256: 5769c841a4a30bc517ee7e75ce57f058d345391a9b5fd3d135df4f7681fc182d

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