Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e27e5d5cf02214…

MALICIOUS

PDF

87.9 KB Created: 2021-10-08 01:49:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 786ec98d67721beb208f9134966c6a28 SHA-1: 72d28706671af2d0cd83e2b495697dd008c039b3 SHA-256: e0e27e5d5cf022145cbe7a5d9d7a52a362d1381dc1baba51ed0722c7b9bd6d62
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL analysis point to a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161379ebf585a7---bataf.pdf In PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16153c3478083b---gudajebibuwisoroji.pdfIn PDF document text
    • http://www.puhito.hu/uploads/ditotaka.pdfIn PDF document text
    • https://sjaindonesia.com/sitefiles/file/metexofibovunemi.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210906153754169320624.pdfIn PDF document text
    • http://pozitron-s.ru/userfiles/file/fuwafuliguvevagi.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/tebew.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/12412033994.pdfIn PDF document text
    • http://kukubara.com/zdjecia/file/86532434616.pdfIn PDF document text
    • http://thaimassageboy.com/ckfinder/userfiles/files/fiwaxure.pdfIn PDF document text
    • http://hosteleriayvending.com/ckfinder/userfiles/files/74662420062.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16155f81938a98---39842146420.pdfIn PDF document text
    • http://meuble-tunisie.com/userfiles/file/magusenuwo.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/lovenojodo.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614cecd465ee2---28081662676.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/46836254024.pdfIn PDF document text
    • https://epagneuls-bretons.fr/caningest/images/file/90590542955.pdfIn PDF document text
    • http://abc-tel.ru/data/File/fuzuzebokexa.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/7de46e45d52de7e764c9769f106cc209/lupatagerixil.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/tomekadalebabakususewuwen.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/nupuguxulelowopafobovolo.pdfIn PDF document text
    • https://lasanisports.com/files/29868114377.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/55811461236.pdfIn PDF document text
    • http://think6.net/ckfinder/userfiles/files/20210923103454.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/21627031454.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=resnick+halliday+physics+volume+1+pdf+solutionsPDF 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_off0000e74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74D 20988 bytes
SHA-256: dc23b3b1cb69a01cde3039c6fc26f9003054a9ca79f784d7ae4b8458e00c705a
font_01_sfnt_off00011e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E85 11256 bytes
SHA-256: 756a4a242330e579a7b6df757bc5df0aef0a42d957de33357407be16bfa1b0d8
font_02_sfnt_off000138d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1