Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ee30d5c92c13db…

MALICIOUS

PDF

197.5 KB Created: 2021-07-30 00:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6aba5c6552cbf2d78521b29850eb81b5 SHA-1: b0b4479c804da5acad594af53b12f4e59285f3f4 SHA-256: 36ee30d5c92c13db2f84a3574eb37393195dcafeac726e68a248a26102983a3a
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links to compromised CMS upload storage, indicating a phishing or malware distribution attempt. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7586

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://diamantina-joaillerie.com/ckfinder/userfiles/files/wulijusurinusewadafobug.pdf
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8a4691c705---38608375852.pdf
    • http://bjaimama.com/data/upload/2021/06/file/202106081211068415.pdf
    • http://bvsaigonbinhduong.com/uploads/files/90626144904.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/04a28a03a5eb5a448c088844b64caa51/48956667371.pdf
    • http://driscollandgibson.com/images/edit_images/file/49916687313.pdf
    • http://anhopphat.com/uploads/files/kewokalijoxa.pdf
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/e4a5b44754a9ae2641423614f9b5b91f/xewuluso.pdf
    • http://yossy.biz/userfiles/file/76569596030.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/e7855e38dffde25523fa2d9b64d9287c/jobapanemejevogudipuboluz.pdf
    • http://vencedor.coop/images/admin/file/vodizuvimitazi.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f5e1f6a3a8---ninete.pdf
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/iokq71m29sbs9m3h8moo0it8qu/26873779886.pdf
    • https://alternativecarrepair.com/userfiles/file/faworavuguwavikajolutoluw.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c844b82f3---86432418195.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/o1t9otfov734o2lnaq2hkkjt77/46545234072.pdf
    • http://phuocthuan.vn/images/pic/file/jemivolepezarurogimo.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/2912m04ep6i2mupatsjdij83j7/rubabasudo.pdf
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/vasezapetobukajasu.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0a693d58e---39784024774.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84fff13f39---16964642168.pdf
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/samokojarebogefiw.pdf
    • https://www.acetechnology.co.in/wp-content/plugins/super-forms/uploads/php/files/3toumnnergskqkbe8q1c3d02lu/5017332331.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/5133dd13445ef673ba729715384919d8/14691983945.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=darling+in+the+franxx+what+happened+to+zero+two
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027f5e.bin
9855f02e89839ca772de1591471e5d254fce6729f466cea1abcd8ca336266bd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x27F5E 3684 bytes
font_01_sfnt_off00028e38.bin
6b1b8300e3d6391490fc17148b164198d21bcc60c86d06e7de3259b4d85dbb3c
pdf-font-stream PDF embedded font (sfnt) at offset 0x28E38 16084 bytes
font_02_sfnt_off0002a36c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2A36C 16792 bytes
font_03_sfnt_off0002bb83.bin
016185dad9553390ce2fdfedd8fc73327edc1eb56c8e067e6661c350faa18366
pdf-font-stream PDF embedded font (sfnt) at offset 0x2BB83 10856 bytes
font_04_sfnt_off0002d45b.bin
0dfa1ee723c89016653ab951c942f67c2e7ac979f95aa2e53076f627faa69d14
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D45B 18320 bytes