Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeb801a420c544ae…

MALICIOUS

PDF

99.4 KB Created: 2021-07-21 07:30:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3b6e604e8ba808f74976a32f9cd0c8c3 SHA-1: e200a3784e6d5024c8eee58e15fd25905cfb6015 SHA-256: aeb801a420c544ae87c5de0f1fc484da040e647868d7a7901ba6bf7af9d59fcb
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised or disposable hosting sites. The presence of a link farm and the overall detection suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://westleyden72reunion.com/clients/4/46/469dc9162705cbff2d1fbe132f144f37/File/74213056523.pdf In PDF document text
    • https://mwasafat.com/uploads/files/goxazozobuwi.pdfIn PDF document text
    • http://fitviewer.biz/files/file/45085463554.pdfIn PDF document text
    • https://cungcapthitdetuoi.com/app/webroot/files/images/pages/files/94006294770.pdfIn PDF document text
    • http://ildungrice.com/fileupload/fckeditor/file/fazubakig.pdfIn PDF document text
    • http://www.gpe-el.pro/ckfinder/userfiles/files/futokumabokubope.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d494c46a34---80542695979.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/litelemipetipigojeg.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/64614098123.pdfIn PDF document text
    • http://moristas.com/userfiles/files/nepoporidawizijejis.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/7c88e4cb0d2bcae0104e0fdca5628e74/mipusolisisojuzimenitad.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/duvevupusoxegavi.pdfIn PDF document text
    • http://abc-tel.ru/data/File/81164434044.pdfIn PDF document text
    • http://starrwindow.com/clients/863399/File/38111426968.pdfIn PDF document text
    • https://wecafephuket.com/wp-content/plugins/super-forms/uploads/php/files/k42thf0qk3dlt65euslqrhh3e2/muxinokudijunor.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7de1d2726---48142385597.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/73987244029.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/29692634365.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/75c59651ca74d9c8b5c0a45f4f036642/22523920644.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/062031b723a5633f277360aea1a162b4/gazedodelafonopilero.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0365a453350b990185f1c3faf86729a7/39537146800.pdfIn PDF document text
    • https://maisonforville.be/documents/file/34231901078.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae278d8b35---47020037053.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=independent+learning+planPDF 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_off000121cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000139e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E3 10228 bytes
SHA-256: 0359f6ae25556a6add76e1e698a8ed63d19292908efe8c498a0435359ce6956b
font_02_sfnt_off000150a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A8 17596 bytes
SHA-256: f9f0657fe7278a25181a71547b5f5a7602cd045f38dc1ee66fd4517d2006373d

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