Malicious PDF — malware analysis report

Static analysis result for SHA-256 ead12882aac1312a…

MALICIOUS

PDF

81.2 KB Created: 2021-10-05 15:09:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e69bad18909e32411e5ef9a3a3cb2f6a SHA-1: cc8dea70f77bdce4539a7c1d0443794ae3282849 SHA-256: ead12882aac1312a489947d0c4150ef14d6025aa97ee43a6d8a6790fede7c780
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://latarnik-kopice.pl/galeria/file/76486841879.pdf In PDF document text
    • https://olterus.com/contents/files/37330917186.pdfIn PDF document text
    • https://www.sacict.or.th/ckfinder/userfiles/files/lazimaziwijixakitoz.pdfIn PDF document text
    • https://angem.fr/userfiles/file/zuzegovomixudebexowupu.pdfIn PDF document text
    • http://rbc-bezorgdiensten.nl/upload/30913592803.pdfIn PDF document text
    • https://liur-krd.ru/userfiles/file/9210211410.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/8odgjupjo207noqo32v5qujhju/galoridiwekixukubunijaz.pdfIn PDF document text
    • http://pjteam.hu/uploads/26256114899.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16151d31c55ce4---70420570874.pdfIn PDF document text
    • http://dreamwith.gni.kr/ckupload/files/54837843396.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/bijadix.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/buwaxi.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16156a6a9e96cf---xanibuziwaguwavuvedes.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/98230571875.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/jegugifefulekolavek.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/33001096215.pdfIn PDF document text
    • http://zeshengtecphar.com/UploadFiles/FCKeditor/20210914180554.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/481be5585138cff5c5cbc78cc53f9915/wamunefukotobeli.pdfIn PDF document text
    • http://vps73.juicy-group.com/editor_upload_image/file/jomeko.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613f36eec73ee---38852402009.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210912_131514.pdfIn PDF document text
    • http://stagelight.pl/userfiles/files/mulujofurubutefugazi.pdfIn PDF document text
    • http://taiwan-tsai.com/upload/files/rimisevafakedimozozukidok.pdfIn PDF document text
    • https://jungleflightchiangmai.com/Uploads/files/77231172611.pdfIn PDF document text
    • https://beautydent.hu/editor_up/zakezulagakiwotew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=time+response+analysis+of+control+systemPDF 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_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 10716 bytes
SHA-256: 8ed658cd1873be4933cbd664bf9a88f85f89a60258b7af713b6da92c12f62fde
font_01_sfnt_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C3 18960 bytes
SHA-256: 8aedde40c477405bf9815a811ab94347fe7de08348eb9e58ed0e33d05c0cc28c

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