Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5dbbe8fe1e5b91b…

MALICIOUS

PDF

93.0 KB Created: 2021-06-28 07:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 44c5b315c7cbb2f03a689c39dbbe29e5 SHA-1: 6c30172fe871b31d952f8f7e2e2a4f366384e799 SHA-256: d5dbbe8fe1e5b91ba88920c44663d400ec90095190a52df5d852ac0d61c61937
196 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV, as malicious. The 'Remote-support tool lure' heuristic indicates the document's content likely instructs the user to install or connect with a remote-support tool. While no scripts were extracted, the presence of numerous links to compromised CMS upload storage and disposable hosting suggests an attempt to host malicious content or redirect users to phishing sites. The document's structure and the nature of the heuristics point towards a phishing or social engineering attack aiming to gain remote access.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/ptg311k1kabmr314fglcnlr506/piwazemujurulonafamokav.pdf In PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d70d819d13b---kibifed.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/55462628932.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/sukinujuviloto.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/26799924905.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/81995473129.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d401113fcd---30742410316.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/79905206987.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/7c795b049ad0b2afeebce9bd88c793a9/41651726668.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16082d91edd51e---77701107495.pdfIn PDF document text
    • http://wingprocess.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/limorixaz.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1622760277127091324.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/66115243202.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/80066220607.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54fb11b7ae---jilifomamafit.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a90cff4a376---77164016599.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/l6u7vfioc0ukoeb110ifbm3cm5/41660206844.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/73385401d6b7a1d0a83c3431aa959f78/44235197320.pdfIn PDF document text
    • https://varbackaforskola.se/ckfinder/userfiles/files/dadugefukokegimetuzofax.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/talaxe.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/a6v4taakdmn4mbkmkukbo2i5la/18838591212.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a4eda48a31d---kezelota.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d371566f9d7---zibususos.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/mu8017r6etna66d2fdnvq9gh4v/vivikasekulabexinisut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=gas+calculations+chemistryPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10757 10748 bytes
SHA-256: 8ad86f6e259cfdb07f42ca3e4a84d4fea810113ed39c3be0b69033748d9f69e4
font_01_sfnt_off00011fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000137f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137F7 18028 bytes
SHA-256: 8f04bc22137c2ab31e3d43889b96c9925ca07a4beaa7212878c173d5e50fbe20

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