Malicious PDF — malware analysis report

Static analysis result for SHA-256 9202b2d21b403852…

MALICIOUS

PDF

86.0 KB Created: 2021-07-09 22:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7cb3567e5ccaa2fbe932617c295d82ad SHA-1: 661fc71f0e65f060b4054b5eaf91db24375d6bb5 SHA-256: 9202b2d21b40385274e71ce5e6e8e81a563eca51c2e5245e243024e793bd7724
156 Risk Score

Malware Insights

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

The PDF was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to numerous external URLs, some of which host further PDF files, suggesting a phishing or malware distribution scheme. The presence of multiple links on compromised CMS upload storage and disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://paradisetnl.com/FileData/ckfinder/files/20210708_4F8B7CC20DFCBE2A.pdf In PDF document text
    • http://sh-ruiyangcpa.com/userfiles/file/2021-6///20216231651106967.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/15359514394.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/5b6b7a98dea9a5e5ee89010837bb012a/lutemoze.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/90137183272.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/zugop.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/f73e4cc28f79b6152b1912b9050e2915/pikuziki.pdfIn PDF document text
    • http://upperdublin1970.com/clients/3/3b/3b2fb281f4756d03d37a29c41a8c1d95/File/79318481966.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/30027522897.pdfIn PDF document text
    • https://ceral.pl/ceral/pliki/file/39156038837.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/lago0kqeuoi0k5914ckqa9qlc7/40616299059.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/b9ef2076219443ceb49c2d5a5030e904/9130549373.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093981dbd01d---nopawurebekadaxoman.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/akqqmbs0o6ciahtrpqgd4l7h1d/soporivugan.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9b8a2ca9a---worepibefokirobupimewigi.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4722946f7---33143069750.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160b946e7bc3a4---mefofagatojunede.pdfIn PDF document text
    • http://olterus.org/contents//files/96332000062.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/70546308994.pdfIn PDF document text
    • https://www.cpro.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082bd1c96391---mafuxof.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/rujamiketi.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210524062511466.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/50f09de1c27f3f2ef6bb88b97003039e/82679052764.pdfIn PDF document text
    • http://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/jowerewapufadeloropefaniw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=the+meaning+of+stoopPDF 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_off0000ef4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4E 16944 bytes
SHA-256: 6aeb1839e8c99d64f1f6e92692701679674df1e1c1d74542127418281674429a
font_01_sfnt_off00011bb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB8 10620 bytes
SHA-256: 3d5d90fa6029f29814be90a85235c42e8c23c6866a2ddf14002a8bc65d3b30ae
font_02_sfnt_off000133da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.