Malicious PDF — malware analysis report

Static analysis result for SHA-256 ece2af47039c7e97…

MALICIOUS

PDF

84.8 KB Created: 2021-09-13 21:28:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8a52167d0aae6b68cd0999da836d9f54 SHA-1: be79ef3fb48b61e526eeb460d96e188cd65237bd SHA-256: ece2af47039c7e97cf1ff476d179011996767e7c5e4ab394801a66a6bfcf8fd4
156 Risk Score

Malware Insights

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

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://imbirimbir.ru/files/12323378953.pdf In PDF document text
    • https://kvizek.hu/ckfinder/userfiles/files/dubofu.pdfIn PDF document text
    • http://gaushalango.com/uploaded_files/userfiles/files/jumapodidumuliratovipevop.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139306f20e40---29111455240.pdfIn PDF document text
    • http://com123.vn/uploads/file/56536063723.pdfIn PDF document text
    • https://galaxy-training.com/userfiles/file/suwaxulen.pdfIn PDF document text
    • https://diarch.in/WYSIWYGImage/file/famizuku.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/rokewaxabiki.pdfIn PDF document text
    • http://box8websites.com/ckfinder/userfiles/files/35182504713.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/22311307529.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1a2e21415---japumiruw.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/95980184978.pdfIn PDF document text
    • https://0a3exp.com/upfiles/editor/files/dosiwi.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/xofimu.pdfIn PDF document text
    • http://www.fuchingrading.com/upload/file/4664323853.pdfIn PDF document text
    • https://sieuthimayphat.com/ckfinder/userfiles/files/pefaxaj.pdfIn PDF document text
    • https://wilocom.ro/ckfinder/userfiles/files/muwijasixukinekiz.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/ligazaz.pdfIn PDF document text
    • http://probeg2000.ru/files/userfiles/files/38571284365.pdfIn PDF document text
    • http://pcccmiennam.com/media/ftp/file/94493193144.pdfIn PDF document text
    • http://hotelgiottotorino.com/userfiles/files/tunifojixabutugiv.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ca286733a---kivusafomofawezazaguz.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/ead790cf84be1ceaad59ac1aa7a61f49/nuzajopibadezodaxewejito.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/lamafew.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/cmr3sn51c1ut6v40mt3ilj6sio/kubemakelabarerero.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/85e90f0b0d4a9038f715a7d739d38e09/jadegowoxozagufoz.pdfIn PDF document text
    • http://www.larucheapain.fr/ljk/file/7985308565.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=b%E1%BA%BB+kh%C3%B3a+%C4%91i%E1%BB%87n+tho%E1%BA%A1i+androidPDF link annotation
    • 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_off0000da53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA53 28932 bytes
SHA-256: 75fa50e25e31ac62022cb7e86ce049995c535e18463366e019a98586bee00f9c
font_01_sfnt_off000112cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112CF 11064 bytes
SHA-256: 113855c70957d69e8fa1ef8c98e6184714d4f8fadf438eba7d8605ac3cc5240d
font_02_sfnt_off00012b1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.