Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe3185582e9fe2b…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 04:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4dbd4efbc425ae3c1b851ab1cf9669f2 SHA-1: ccd19c627cca4775c16ef8a0c1068c6c7811011c SHA-256: abe3185582e9fe2bebdcaf84188ba1fe786e6bb6614b72d785d0a351b25420d1
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with several URLs pointing to compromised CMS upload directories. The ML classifier and ClamAV also identified it as malicious, likely a phishing or malware distribution lure. No scripts were extracted, but the presence of numerous external links suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://peterdegendt.be/file/jasevugavulobuzawux.pdf In PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/952a9457f979553a53ca9215a38e37b6/42165800350.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/82783850510.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/kititodowulovozik.pdfIn PDF document text
    • http://videofilm-tv.ru/content/File/73121313448.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/uok9ecpgualbq0nmm068a6jir5/gomona.pdfIn PDF document text
    • http://rheumatology.institute/upload/content/file/24965340004.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/6ae5819d2bcceca9ae30a00c6177cb5c/21917187038.pdfIn PDF document text
    • https://zagi.hr/files/17780819111.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/3k4dhfgnkp0ls7f4tf7or6u9e0/xeritimetenixilevu.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/a94192b7c1b3d932896df100d59a998a/ruxinejewoxomo.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37840190231.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f27b673dc5---zavag.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16090292d4ed17---wimafujijopukibokumolut.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/30507829047.pdfIn PDF document text
    • http://accomplishtheimpossible.com/userfiles_ati/file/66667168356.pdfIn PDF document text
    • https://a1-recruitment.fr/v2011/Files/fck_upload/file/sepanokipuvew.pdfIn PDF document text
    • http://risorsaterra.it/userfiles/files/63897625178.pdfIn PDF document text
    • http://gadkowski.pl/repository/filemanager/file/53654578876.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/bda49a9caffaecd3ba1dc119399151b3/ribezotubavuraju.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/natuvawune.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b1b11fbf5---92138429457.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c5137898a---daduzojuno.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/65226079704.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16079c27e9065f---tosutimugadatudej.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/semixexela.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=pdf24+creator+free+download+italianoPDF 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_off0000da04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA04 18640 bytes
SHA-256: ecb98c57c6b1141efd1b0d53e49a382a0a90d5cc28dae351c62052d881bb6532
font_01_sfnt_off00010a76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001228d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1228D 10584 bytes
SHA-256: 8a572d8eea0f054d47243e34bcfe263474995bb1306f69dbe8eafb2949128ea5