Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa028049805bd22…

MALICIOUS

PDF

83.9 KB Created: 2021-09-02 08:25:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c235c464df8a9f617911834ede8d31e7 SHA-1: f703fd62420c18d2e234fa6ef7d75ea54408ca9a SHA-256: 3aa028049805bd22e302a5116153091afc6b4d4c3dbe9633d1f3ffb4715244a8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e12076ed3---tajegakagare.pdf In PDF document text
    • http://patp1ryb.ru/media/file/zunuvuwigefilofefoka.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/revuvufa.pdfIn PDF document text
    • https://www.mmgrowersg.com/ckfinder/userfiles/files/49218492838.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f85697480b8---rawax.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021051910113173499.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160a31844da2e5---rafasipe.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160915c5484661---60922215678.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/b8d0067aa48bc90f0f2415540a664cf5/xadupuleze.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/8jfjrs1mn33f39uoo4a67tdmcp/dowepuvozajiwegaj.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/b1610f1aaf012b87e3e11d499608ed19/46986330421.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/b8cb53bf2045f46d62486192aa2b036c/tufutumipojosupamexetisu.pdfIn PDF document text
    • http://kemmurad.com/webroot/img/files/mubodubakif.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/rigapakilorefaxeturomanu.pdfIn PDF document text
    • https://tckontrola.hr/files/gawerimumizoludotesilitoz.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/tapulavafanosawumibanafu.pdfIn PDF document text
    • https://legend-chang.com/UserFiles/files/govufalepabelajonelodapev.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/nefoj.pdfIn PDF document text
    • http://morebricks.com/ckfinder/userfiles/files/xawibikosabew.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/dotevolotesisoxejupopoxuk.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/5daee5806ee1678f7565aaac2e7555c7/73927164315.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/acd5daed1fddd3122daef9166f35a039/77415326540.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/popalefadufawetivurevak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=table+of+distributionsPDF 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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 16800 bytes
SHA-256: 69de6254d7a892cdfe85b87e64e2cb27966accc6db13d8a38037fd1f9c8bbbaa
font_01_sfnt_off000110c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D9 10552 bytes
SHA-256: e0ca96151e23895a68e6664359fbf7845ce1d4515e6d335462caaf3e29654c17