Malicious PDF — malware analysis report

Static analysis result for SHA-256 62fd3290cd7b1a17…

MALICIOUS

PDF

92.5 KB Created: 2021-08-01 07:56:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0cd6d9590b845622e6ae251285cb2e2a SHA-1: 291fac12e929d490a559c9810fd63865c1b75bb8 SHA-256: 62fd3290cd7b1a17237cfd6b82693d1a7ded1907912af4a66305470eb80f14d0
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'SE_BROWSER_INSTALL_LURE' strongly suggests the document is designed to trick users into installing unwanted software, likely malware or spyware, by impersonating a browser update or extension. The numerous embedded URLs, many pointing to compromised CMS upload directories, further support the distribution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b69fe89414b---33806050016.pdf In PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/15ffacb85beb791818885e1957867294/84013458243.pdfIn PDF document text
    • http://africa-emergence2019.com/userfiles/file/72173656189.pdfIn PDF document text
    • http://gaskinfamilyreunion.com/clients/b/b7/b798c9f9e2af69c3a5b950a06e4ade8e/File/gezogapusogubadaxot.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/vesuw.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/3sbqcb9iajg07q4d3eb1bftj37/fatofonigonefujefogu.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/31478783937.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160896c54a71d6---lasorogibirima.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/19556721317.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/xorerepegizufatuwavedufur.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3d3eb4a5c0---zigolemoku.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16085838e5bbf1---nopapivelusosuxasudakaw.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b02e9f4c4fb---27902766838.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/46208293293.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd5b713f7c---4500899348.pdfIn PDF document text
    • http://tms-operation.com/upload/files/tazupabuwelop.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4e4150b41---3252626158.pdfIn PDF document text
    • http://enidbtwcreunion.com/clients/5/52/52e94d62e82ff66504c7d921fc07bf70/File/32024553090.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160992edb8bd39---kebed.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/oon4abiu4e22l5vrbpufm9tjbe/27731997905.pdfIn PDF document text
    • http://oletrans.sk/editor_uploads/files/31500166720.pdfIn PDF document text
    • http://synthecinter.com/userfiles/files/23131877850.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/e5f51a2a9cfebea5b155893c4ea16b81/68422431070.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/a20ee22f6671d02fae8771540bf9f118/58812150903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=harbor+freight+coupon+2021+marchPDF 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_off0001013b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011952.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11952 11236 bytes
SHA-256: e30cbd7bcf0200feced96254b41715f72f1a2065c8a9a40d5615820e429150f4
font_02_sfnt_off0001334e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1334E 18252 bytes
SHA-256: 578fdb50ece8677aed3db74e80d1f3c9a34243a3624f862ea094d7335ad3e1a1

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