Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c55ef771b44f906…

MALICIOUS

PDF

106.1 KB Created: 2021-06-30 08:46:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ce1412ec9af32ecc5142e63ba489d354 SHA-1: 52cce4493d8a9a043b056ef6fefc23e49022b80f SHA-256: 3c55ef771b44f906200e925a4beb1f86ab01c9f52525933d1f7db006884229df
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Numerous heuristics indicate the PDF acts as a link farm, directing users to compromised CMS uploads and disposable hosting domains. The embedded URLs, such as http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f8231bec7---sokulolonisu.pdf, are likely intended to host malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/gj7u5sdns5d3j0u4qbtedg4o30/40970669899.pdf
    • https://triptoboloyfoundation.org/editorsfiles/files/28947878892.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/raxepu.pdf
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/mtr5ar424fuolvcuuv8calm86k/71967611508.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d60e9b27ab---6224469008.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f8231bec7---sokulolonisu.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/hn2qmntlpn0q148pcgd6sktr2f/zawesozoz.pdf
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dea18dad0d---duwimepowufap.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f0cc11709d05e5637ebca1c20d567d15/gifidebojekerezugiritad.pdf
    • http://youandisagenix.com/ckfinder/userfiles/files/buzekelononos.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad04af18903---18258000166.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/gjoqae7ktk0ua488qvuahjcom9/31854338034.pdf
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607353fa057c5---nerira.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1607814655eb68---78630977454.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b46a62b56d2---rulupilujomofawuwetaru.pdf
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/pipfko95ncvocvcbnnodstct6n/26670170065.pdf
    • https://unosms.us/userfiles/file/bodura.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160784dc11e8b0---lirajeroturadewuxikorawaf.pdf
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/vpmcnqojpoa4j77d05h7e340r0/47910804231.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099a45c1744f---11849305238.pdf
    • http://kasintorn.com/images/upload/files/19846246255.pdf
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609b7f017a300---turiga.pdf
    • http://abnicum.com/files/file/49249408156.pdf
    • http://fiumaradelsossio.it/userfiles/files/xoloxuropupaxazojokexi.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/27407e2a98509e8356f660449e6924ff/vorizodajokatizejabujumuw.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=testimonies+of+healing+from+down+syndrome
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013c24.bin
6b38b85287f7c11749a43fd2ef6a6b9ec506e2f87fb2ac6420d63e57bfee21c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13C24 10964 bytes
font_01_sfnt_off0001553f.bin
2935e0f785a12f36a8bebdfe753f799169f77ecc214b5b6d3809091d9d0f2c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1553F 17480 bytes
font_02_sfnt_off000182a6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x182A6 16792 bytes

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