Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fe323d520eea88…

MALICIOUS

PDF

102.9 KB Created: 2021-06-29 01:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 686cd73d8b7544fb8ab88456149b4d13 SHA-1: 79000fc4d17ba230ca3495b100c27689ede47bcf SHA-256: 29fe323d520eea889932fb7a51a282facf9c7ae17de1d0fe723d14b08341e742
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external URIs and link farms, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://garglob.ru/uplcv?utm_term=woven+fabric+types PDF link annotation
    • http://kursadowicz.pl/Upload/file/dexovonake.pdfIn PDF document text
    • http://cichanski.com/Upload/file/27469681486.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160816650178cf---binusubexixediluxo.pdfIn PDF document text
    • http://psychoterapia-przemysl.net/img/userfiles/file/99276821753.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607506512f468---89852841937.pdfIn PDF document text
    • https://hurtowniaroza.pl/upload/files/belenu.pdfIn PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/78279641172.pdfIn PDF document text
    • http://afslab.asia/upload/files/47997887493.pdfIn PDF document text
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/20979159439.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/moturulubitibuxigilan.pdfIn PDF document text
    • https://smallislandcurry.com/wp-content/plugins/super-forms/uploads/php/files/c04f5f1de8a175c63303eec275685f38/83680663890.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/65016656081.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210531_286A2FB5285ABB6F.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160aca8377dae9---74172472654.pdfIn PDF document text
    • https://akita-inu.lv/www/files/files/57306360070.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/715ab397f23bc2ee6ce4cd86c2d15c6b/77005216563.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/25348582797.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/loxofimoga.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/69952950820.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/769550333.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607099098a16b---22649744616.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/zuzuziwiri.pdfIn PDF document text
    • http://graficaeformazione.it/userfiles/file/22099110155.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_off0001316a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1316A 10740 bytes
SHA-256: 6a516a383ef0e38be5deafb80e49149209d5ff24a008e072870cfff970056459
font_01_sfnt_off00014a1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A1E 17052 bytes
SHA-256: 04ad0d0c978086871768384ba3dd4d49560c5129cf79a28c83a2342ec74cf754
font_02_sfnt_off0001768b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1768B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1