Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa38a8bb1aeb5e68…

MALICIOUS

PDF

90.7 KB Created: 2021-09-02 20:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: e078f4551b48fc811328e613fd8e8f23 SHA-1: db404be364ef4f12592bdef829d18b745616d3df SHA-256: fa38a8bb1aeb5e684dfcec99e30149658135a680e9ec55d470b156b1dd8d1826
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised websites and disposable hosting, indicating a link farm designed to redirect users to potentially harmful content. The presence of these links suggests an attempt to lure victims to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160acdc7049671---49520979420.pdf In PDF document text
    • http://sity-luxe.ru/userfiles/file/79251177918.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/56651500543.pdfIn PDF document text
    • http://ipceurope.com/assets/file/juwivixenaleba.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/ad87e80e00333b28abf481e74bb0ea2e/fazebo.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f72aa05c48---68503673393.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/9728173598.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/zowenasidorivetali.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/6bc6c13f12e4b062a4ac4ad0c282e30d/fifojakonafosixebili.pdfIn PDF document text
    • http://eskuvoiiranytu.hu/blog/file/63434393649.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/55266245231.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160705ca9f2237---vogizi.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/9b1e58bb0f6ba4be6c6325b3291b1ffb/25954013720.pdfIn PDF document text
    • http://ajarnveerapong.com/UserFiles/file/fejarokekepefasofexaza.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/b9386842b600ab99287e3b2df5a328f0/duwonivimajiginoke.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/44184577228.pdfIn PDF document text
    • https://argumentua.com/i/file/5867784776.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/joxawis.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/0402188ee317556167a06d5bc712129f/17545876752.pdfIn PDF document text
    • http://wsystem.sk/userfiles/files/21966851047.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/87685310644.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=%C4%91%E1%BB%95i+file+pdf+sang+word+mi%E1%BB%85n+ph%C3%ADPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD523 11512 bytes
SHA-256: 5d5f94e70f85855e1875c2ec554193e68219b66a50477370d36df11758409057
font_01_sfnt_off0000ef80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF80 16620 bytes
SHA-256: 148e81744431d849bded03d00befd50d4e452c5aeb5fcf5e889a078e07932b19
font_02_sfnt_off000106e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011efb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFB 23948 bytes
SHA-256: d7096ace6d2fae7481c258c504b4b514f073fd4aadc0b0efa36b2b2f345b466c

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