Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e3ac8402b1c8561…

MALICIOUS

PDF

95.6 KB Created: 2021-09-17 07:54:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e557c15d15855418aa5942f6f5ce19a9 SHA-1: f47038729519cbf38dd6f732a03330a824467505 SHA-256: 9e3ac8402b1c85614b8b0ad383e150512f9505c5da931b522231c384c3bc7879
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress upload directories, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9806

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://medgal.pl/admin/ckfinder/userfiles/files/rolikubapexexesa.pdf
    • http://leeharringtonhomes.com/userfiles/file/xekevogefumifilavezadeb.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/f6050b9ca955c103d367672e470f8260/saruvowetena.pdf
    • http://sinoscaform.com/upload/ckimg/files/202109161052455210.pdf
    • http://isvpro.com/custom/files/kowilesodizafanuj.pdf
    • http://kliknetezde.cz/admin/obrazky/file/40558150724.pdf
    • https://aalatour.com/basefile/b2caalatourcom/files/57303738408.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/a75fc127057d6d4bee98f4d2b92ba540/kuwagit.pdf
    • http://arredamentoambienti.it/img/file/nuvirakosodasibidewew.pdf
    • http://nsdadventist.org/FCKData/file/1251582303.pdf
    • https://propactionvehiclesuk.tv/userfiles/files/56902571858.pdf
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/d4e21da8a958f3670980face57d43ff3/50549735957.pdf
    • http://cheliabinsk.realxenon.ru/uploads/files/19916423630.pdf
    • https://sunpower.lv/ckfinder/userfiles/files/794494939.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/ep3jp55hgei91t9de27vhgsurn/18760834610.pdf
    • http://aelma.com/sites/default/userfiles/file/74055119628.pdf
    • http://ng-sons.com/userfiles/file/26135484479.pdf
    • http://slovoveri.org/userfiles/38035817434.pdf
    • http://josquin-capella.de/download/79767991741.pdf
    • https://sanagustin.cl/files/30042185308.pdf
    • https://megashina24.ru/files/files/dokozuzenup.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/kulefu.pdf
    • http://only-svet.ru/upload/files/xipowijulotokosuwanodi.pdf
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/33010221455.pdf
    • http://27derajat.com/assets/ckfinder/core/connector/php/uploads/files/87189236017.pdf
    • http://yachtales.net/admin/userfiles/files/mokegujukipi.pdf
    • https://bahia-group.com/ckfinder/userfiles/files/piburukavedeguk.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=fake+gps+apk+ios
    • 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_off0001102f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1102F 16792 bytes
font_01_sfnt_off00012841.bin
72739b80f3599a359e3d0d61570a5f9a9e3ca06f7956130246b65c407b5cc56a
pdf-font-stream PDF embedded font (sfnt) at offset 0x12841 19268 bytes
font_02_sfnt_off00015a5e.bin
5f2f9659018826a26558a308e940ac023049bd0a2f0371bfcb6e444a0b1ca878
pdf-font-stream PDF embedded font (sfnt) at offset 0x15A5E 10148 bytes