Malicious PDF — malware analysis report

Static analysis result for SHA-256 4782c7b1347546d4…

MALICIOUS

PDF

84.0 KB Created: 2021-09-21 00:12:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 41e6ff4647356216e14c24b6c72827c2 SHA-1: 9e03d3420010fee22e66aa5f48b11765fe0b3b18 SHA-256: 4782c7b1347546d49ea0d6c7e77afd188d70d48a6d96cf977a1556dd16162e5a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable domains and forming a link farm, suggests a phishing or redirection scheme. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document, likely intended to deliver a secondary payload or lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://easyhypermarket.com/userfiles/file/menig.pdf In PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/89451350083.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/wurogujiri.pdfIn PDF document text
    • http://sziszolg.hu/editor_up/63661799153.pdfIn PDF document text
    • http://bankerz.in/qpic/files/13795588408.pdfIn PDF document text
    • http://sanalights.com/admin/admin/uploadfiles/file/31831742819.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/nu7s3pkd3v2ce9ng7vl3us5o72/80006444836.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/997811f0e50dc62706079f080da62608/1765600616.pdfIn PDF document text
    • http://globalcentral.net/contentupload/fckeditorUploads/organization_/file/6251650886.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/xokuwepo.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/tejodiwisenubolib.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/vobigi.pdfIn PDF document text
    • http://xn--c1adbeke4asdefy.xn--p1ai/ckfinder/userfiles/files/juvonilete.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/18536383651.pdfIn PDF document text
    • http://sherwoodchambergolf.com/ckfinder/userfiles/files/37421197879.pdfIn PDF document text
    • http://idrogastermoclima.it/Utentifile/FCKPage/file/84834555624.pdfIn PDF document text
    • https://safecampus.in/cmsCart/upload/file/86813345385.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-9-20/20210920015142256608.pdfIn PDF document text
    • http://officeharbor.com/pdtInfo/13882606824.pdfIn PDF document text
    • http://avrig35.ro/uploads/fck_editor/file/79582824587.pdfIn PDF document text
    • http://logicparcel.net/uploadsEditorfile/jawabepo.pdfIn PDF document text
    • https://omnistopbollards.com/application/third_party/ckfinder/userfiles/files/lituvemuxebututizovuzimij.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/25397537492.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+android+games+can+you+play+with+friendsPDF 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_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98A 17876 bytes
SHA-256: 210dd6838f2b7a6d482b3a20b9af0446d854aeb578987e4d40b184ff2e3652b3
font_02_sfnt_off00012797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12797 11360 bytes
SHA-256: 57e1752bbb35a14fec21c8a5b83b6529ea8c009efa349f4d8f44a552fa54c198

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