Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec063ce6ea943b2…

MALICIOUS

PDF

80.2 KB Created: 2021-06-30 01:03:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dd4d55f7a0ec1e561ed595464fe8424f SHA-1: 88b65bb133d62f74c6012132f948e945ab5ce462 SHA-256: 8ec063ce6ea943b2f47e20b3aa6766124041b62f8a857b420e4c2559eb4a4cc1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of multiple PDF link farm heuristics confirms the document's purpose is to redirect users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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://aggengr.com/uploads/CMS/file/makonipemarakum.pdf
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160876e7329416---rodazukonigomabigominafe.pdf
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/m0i18j3poi9jr9is9at3uai44t/4308007247.pdf
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/77321352119.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/c17a9b776d8f59cc9a774034c7f4dce7/52983226198.pdf
    • https://a2designbg.com/userfiles/file/kivum.pdf
    • http://posekatzahradu.cz/files/file/72962559738.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be5d3eb8200---poripufokawiwopaz.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c91e48518---ninez.pdf
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/bqfrfjq4k5crukd60ea94rndlk/34454227598.pdf
    • https://roweryelectra.pl/app/webroot/uploads/file/16212544898149.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9e3c5ef0f---wewowigexuvawuvuj.pdf
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/57b26bbe689bcce87e5550d43530929a/zejariluzilaxelas.pdf
    • http://inter-travel.hu/_user/file/kamopazuw.pdf
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d68e536e831---60535310922.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11debb1352---watidozugemutapefi.pdf
    • http://nutronicltd.com/userfiles/file/pefoxinuzat.pdf
    • http://myucmas.com/userfiles/file/89075695854.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609f661125502---didizulo.pdf
    • http://polyalpan.hu/_user/file/piwukegatej.pdf
    • http://sirmamedia.com/ckfinder/userfiles/files/40862366287.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/f94a63222887e632683d979b2b34e1f0/83902777369.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/6i4brmgbd0vkuf7ga76vs5qk1u/87376074148.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ppfogmsd3pbl5dthgao0dpk4ki/10779556850.pdf
    • https://simon-daulte.com/ckfinder/userfiles/files/fozalonakator.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=ultra+low+temperature+refrigeration+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbe1.bin
c0b09eb1f5137181606a92c861665ae5490f301fa31f5183de03caa7a88d3ca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE1 17160 bytes
font_01_sfnt_off0000f7b9.bin
6d127f9e782ce6ae51a4a2143b48ab103d8966d30ca3b3e8459e7b16890e941b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B9 10868 bytes
font_02_sfnt_off0001109c.bin
98b806239e30f6c7f8eee28fad201595ea49cb9b15508dfd3c27f42a2d265b78		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1109C 1712 bytes
font_03_sfnt_off000118d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118D4 16792 bytes

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