Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3d4d4002b9253c…

MALICIOUS

PDF

207.1 KB Created: 2021-07-18 04:18:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67d7828fa961c5eed2ec765c51802782 SHA-1: b93d9021e72f22939148659d1ff123cb030b6003 SHA-256: 6c3d4d4002b9253c806da26dba848619adc2ea006dbbedb5c18fe68b039840c9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The file contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting a phishing or malware distribution scheme. The presence of these links indicates an attempt to redirect the user to malicious content, likely exploiting the user's trust in the document's apparent origin.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9007

Heuristics 5

  • 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.
  • 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://capri.lt/userfiles/files/91619720027.pdf
    • http://loadcell.vn/Images_upload/files/35268532589.pdf
    • http://blatt-gruen.ch/files/80772069695.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5185a6b115---31434716716.pdf
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/016d8ba60b22f24c02ba8127d3ce2860/13081771412.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b285a13f195---47359217693.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f863ad5710---zenopa.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e590efbb3---gakeginosuvufawosatuli.pdf
    • http://transchem-tech.com/Uploadfiles/files/64770714211.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/4eccd1d198590aedb4444c85761f09b9/72113161312.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607c125bec464---859279132.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/eb0c79a7f5cef976317748775b4529f4/46187201728.pdf
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/oomrfsrgijnn8v2e6u3j346jm4/rufegutezuf.pdf
    • http://funkyspa.net/ckfinder/userfiles/files/xonel.pdf
    • https://bandotrading.com/uploads/file/wufaguwewiduretotivu.pdf
    • https://tort-art.ru/userfiles/file/tumekotuvazeneso.pdf
    • https://deniz-sogutma.org/img/userfiles/file/xanadimefudorolu.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/j6g6hmimo1v98u5jkjbfc2nu21/winulusukuwovem.pdf
    • https://hashtag.school/userfiles/file/61818507454.pdf
    • http://hebertfamilyreunion.com/clients/3/32/3272330ca4c68e8b1120eb7f178c7a05/File/8226112776.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160afcd83de453---xanukosowasasepu.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e8b381852b---rimuxulizofizu.pdf
    • https://balajitutorial.com/admin/userfiles/file/32972998827.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/175786f9bafdf011c050fa6f236da593/92450356024.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d8969d7dd---xalujasukogatoxajibajote.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/66om6ichp4fjgmu11mclksu68a/3686665470.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=rather+than+not
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001346b.bin
239329ca2badc8478fe53c89ad24b4b06a587c591755366d8a219da3801e43c7
pdf-font-stream PDF embedded font (sfnt) at offset 0x1346B 173076 bytes
font_01_sfnt_off0002d28e.bin
29c8f56b8e5a22f2aaf15b53843ee10dd3d6509a2d51be4d9cabcf1a9c553f8b
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D28E 9944 bytes
font_02_sfnt_off0002e87e.bin
199ebff48c7dd11a1e7d9d1f6e32fe589cf7c9ba9c79285bd4f87adadec1cde2
pdf-font-stream PDF embedded font (sfnt) at offset 0x2E87E 17000 bytes
font_03_sfnt_off00031459.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x31459 16792 bytes