Malicious PDF — malware analysis report

Static analysis result for SHA-256 037fa222ca2ce775…

MALICIOUS

PDF

90.8 KB Created: 2021-09-05 06:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8ae667e4644a7a691923286c8bd06965 SHA-1: 399eadb53be252e235a00e9e386e9c020f043b05 SHA-256: 037fa222ca2ce7752b3971b930dcf8e6767c47fa723b7e069b221b6cbe3fe5d2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. The PDF also contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://skyrunarser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210530181019342649wtgbg3.pdf In PDF document text
    • http://biirbeh.mn/images/content/file/79205737257.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e8b81b718---kituxonaw.pdfIn PDF document text
    • https://enkaotomatikkapi.com/depo/sayfaresim/file/66016229181.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/faginalevi.pdfIn PDF document text
    • http://qishuochem.com/siicea/userfiles/file/83253618589.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/08fg5libsf6fn215ucqjgr1k3q/34306508082.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/39157385479.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/70467074410.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/29301602635.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16085025130d66---96007191035.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160824c546a144---lanavikugunejakirak.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/wilaliwufopabuvokot.pdfIn PDF document text
    • http://orderleesushi.com/uploads/files/minefu.pdfIn PDF document text
    • http://altinay-law.com/images/file/83289034300.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/girobuguwetigevixir.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/210730025155195857wn8xrw.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/31386798497.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1ed7da348---tovalezezisubazamix.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/99b37728e7efd1cdb9ba5f55a1c83ad9/36820278991.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f7693be65---34711472874.pdfIn PDF document text
    • http://zae.me/datafiles/file/litesojofodigeresogalaro.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/48420745bc2e5475d0b92864e63ad482/loganaxijenedigota.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/44254274783.pdfIn PDF document text
    • https://securitegenerale.tn/userfiles/file/fosavifidilozodinekunus.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=transnational+crime+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_off0000fd39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD39 18256 bytes
SHA-256: 8395f4dd5e72f607ffc484321bdd50192a385ed69eba4fa1fb2c90538ca52ad6
font_01_sfnt_off00012cc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CC2 10744 bytes
SHA-256: 694a78737fba567df4afc4c69cb7aafb8ec8130a3368be4f808ed7b652ebcdda
font_02_sfnt_off0001456e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1456E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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