Malicious PDF — malware analysis report

Static analysis result for SHA-256 48eeb2a029572c12…

MALICIOUS

PDF

78.0 KB Created: 2021-09-08 02:45:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1918b2ff973b7d8d5710533661a19372 SHA-1: aadddd2ec2492c2896486a38f9ed20b067ede076 SHA-256: 48eeb2a029572c12ecf4c10722ef0eb8f82ae36f6cb4a9d0ba4c3e8f3b057f81
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to external sites, some of which are hosted on compromised WordPress installations or disposable domains. This suggests the PDF is likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://micruts.org/userfiles/file/xevezufozodanokito.pdf In PDF document text
    • http://aprendanow.com/wp-content/plugins/super-forms/uploads/php/files/68c1a2d247dfe9611d8b972d6d804208/2861183652.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210620_082310.pdfIn PDF document text
    • https://asi-filter.pl/files/file/45872272923.pdfIn PDF document text
    • http://santeh.md/img/files/koradef.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c892c04e857---karipivuxabad.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/49a796dc98731452086c6a20d2c7fe94/79274151687.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/eebb305298d1cd2877c1b211d860c715/sanunuwa.pdfIn PDF document text
    • https://sergeca.com.ve/ckfinder/userfiles/files/46277957910.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c4adabee231---rogokomapif.pdfIn PDF document text
    • https://ancoraeducacion.com/images/67589971864.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/048ac8c915fe8340326b1b080ee89538/vewuwivofunur.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/4836306223.pdfIn PDF document text
    • http://goodlack.cz/userfiles/file/56294662403.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4080411978b4106c8448db7bb715870d/24026249249.pdfIn PDF document text
    • https://bangkoksolarpower.com/syner_upload/images/files/30860978159.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb429ad596---keralobobovaxolurajozedoj.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/10522007478.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/weraj.pdfIn PDF document text
    • http://papienbanana.com/user_file/file/72288352051.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093d282c2429---memom.pdfIn PDF document text
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608141114841e---60700792632.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/65653961801.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bcefe64a478---kiwek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=seeley%27s+anatomy+and+physiology+pdfPDF 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_off0000d031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD031 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 11068 bytes
SHA-256: b5ac44bced4418156bd6b6b899b45fdda0821007308c0d24a069c58a21115ed7
font_02_sfnt_off000101b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B4 15888 bytes
SHA-256: c72536c0817372a69018f7cbcdb5f4df7d38c3227282ba4a5469e56b2d277df7

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