Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5fe16c2ab4c9117…

MALICIOUS

PDF

77.7 KB Created: 2021-09-17 10:18:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4317f70072e97205f14ba9077229463e SHA-1: 0e89539766ec0743aea423715b2b5b955becacd6 SHA-256: e5fe16c2ab4c9117a3d5394196dbd13b9de58ff5221136bd4306814368e243f4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crewmak.ru/uplcv?utm_term=the+edge+of+love+full+movie+online+free PDF link annotation
    • https://dmshospital.com/mm_engg/files/90672534189.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc498a2859---wapixiwot.pdfIn PDF document text
    • http://drtamerturan.com/file/xabobiwabudufutog.pdfIn PDF document text
    • http://aqcorth.specialty-match.com/upload/files/83597303329.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/13786499050.pdfIn PDF document text
    • https://marblobathware.com/app/webroot/img/files/27096643275.pdfIn PDF document text
    • http://boracayg.com/FileData/ckfinder/files/20210908_BB6FF3FBE22C1773.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161400fd7ad916---45186443264.pdfIn PDF document text
    • http://www.asiacoservice.com/file/files/38813988998.pdfIn PDF document text
    • http://hanasushichoice.com/uploads/files/vivinu.pdfIn PDF document text
    • http://mqskin.com/luutru/files/bulifowot.pdfIn PDF document text
    • http://le383.com/uploads/files/88824098360.pdfIn PDF document text
    • http://www.egymast-segito.hu/uploaded/fck/file/setolivusapegujazadujam.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409090652eb---kegena.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/70638700259.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/jaxaximud.pdfIn PDF document text
    • https://anitt.in/ckfinder/userfiles/files/tevewulepi.pdfIn PDF document text
    • http://calisnt.com/uploads/files/25366904271.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/c4a33da41bbe6707d78a3825b6194c61/23346359572.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/80443253279.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141bda5e3ab2---vagilisoxulufi.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/74011862129.pdfIn PDF document text
    • http://diamant-x.sk/UserFiles/file/47320227700.pdfIn PDF document text
    • https://www.truckersplantparts.co.uk/ckfinder/userfiles/files/18284960827.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/89373705661.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_off0000cb8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8A 17496 bytes
SHA-256: 53483efd3e4452416de60eba1e251eecb0156d5bd0f1e942411a3e999dcb63da
font_01_sfnt_off0000f907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF907 10504 bytes
SHA-256: a25024ca388ae5dab40471bcb30cda3f254ce54e013086d8e5be12e60c2cdfe1
font_02_sfnt_off00011072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11072 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1