Malicious PDF — malware analysis report

Static analysis result for SHA-256 363f1db7eba3958d…

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 16:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d000b750110a00606b27eb85bbcbae23 SHA-1: c337eea1c86780104dcd1c3c8ece2192636a7972 SHA-256: 363f1db7eba3958de8087f7cf865b88c9258601948cf68a7a9fb444a31b1851c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristics indicate it is designed to host or link to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e36a5b4687---59825880847.pdf
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/xaziwemejanilabiket.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748b83b0155---61205364950.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2255e0989---1534365495.pdf
    • https://amd-export.com/site/upload/file/raradiwoxuxurifudaw.pdf
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/42f63510cce33dbbf4b7b7dee3a72264/89134907583.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072635401934---73820954214.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16071caa0e36d5---nelonuvatazegigalewij.pdf
    • http://abnicum.com/files/file/44052672281.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/2714b0768df6ffc6df265908904ee286/gatomuxiduwa.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2304fd92c36018bc072ea72965489e6b/89990860403.pdf
    • https://unosms.us/userfiles/file/90507097499.pdf
    • https://namdolove.com/FileData/ckfinder/files/20210531_286A2FB5285ABB6F.pdf
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/33a567d0c576d8c458a570b72b2bb281/43208072531.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/b40ee6eed05d119d5b66490e17a5ad67/79295673416.pdf
    • https://www.harnoordesigns.com/wp-content/plugins/super-forms/uploads/php/files/ji9fpiv9hkjlhjvlagdbej7us5/51237999617.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b07e4704d19---19306385994.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/33b4b6bc242ddce23ab949cfcac5f24f/galemusegiv.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bee5fba4b49---34016966721.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160891ac36d998---76881866588.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f191c5126---fulakopulafemo.pdf
    • http://zae.me/datafiles/file/safuzejivudafe.pdf
    • http://kanchanaspa.com/ckfinder/userfiles/files/tiniganapesovijavuzuvewad.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8d43bf3fb---tumodusexi.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=how+long+does+it+take+to+get+the+results+of+a+background+check
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f16e.bin
0ce232241099c6f0ddd1e0022c94ba0721df16c936f216baf0f37a680b091cff
pdf-font-stream PDF embedded font (sfnt) at offset 0xF16E 16828 bytes
font_01_sfnt_off00011d17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D17 16792 bytes
font_02_sfnt_off0001352e.bin
7519571c2ae0cf7851de4ad88e133544cc5fb6d9073f3db6ca35b306b52514e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x1352E 11164 bytes