Malicious PDF — malware analysis report

Static analysis result for SHA-256 074e9c4eec6a6958…

MALICIOUS

PDF

81.2 KB Created: 2021-09-13 01:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7365eb876560db16263fe5ea8f7fb7f0 SHA-1: bef3917fb1eaec5f4e2639c0ebc2433fe9528aec SHA-256: 074e9c4eec6a6958c0079ecf808e2fe13dadbdacedfe1435dbe5e45a6078a657
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to external sites. Some of these URLs are hosted on compromised CMS uploads or disposable domains, suggesting an attempt to lure users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://marblobathware.ph/app/webroot/img/files/71801803128.pdf In PDF document text
    • http://geo-equipe.it/userfiles/files/14819925370.pdfIn PDF document text
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/pisovulifinomubapitovatub.pdfIn PDF document text
    • http://artgrafika.cz/userfiles/file/94737375390.pdfIn PDF document text
    • http://sp3siemianowice.pl/userFiles/files/84559435100.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/37210728769.pdfIn PDF document text
    • https://gujaratisamajparis.org/upload/files/lodigamujenelagumetusazi.pdfIn PDF document text
    • http://chicopharm.com/upload/files/gasepexufemusuzojaxedu.pdfIn PDF document text
    • http://sanarina-coaching.de/ckfinder/userfiles/files/12789669115.pdfIn PDF document text
    • http://newgrids.com/userfiles/file/duvafedumakiruj.pdfIn PDF document text
    • http://www.kevimotor-rock.hu/files/files/43378039097.pdfIn PDF document text
    • http://sanxuatbanthinghiem.org/app/webroot/uploads/files/wejajipazoki.pdfIn PDF document text
    • https://vico-real-estate.com/ckfinder/userfiles/files/samezabokazanolefiwo.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135d7747a54b---81639264178.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/zekakivasajutisebo.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///81544336938.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb44f4da53---71118668917.pdfIn PDF document text
    • http://sung1.com/upload/files/85316352261.pdfIn PDF document text
    • https://akemi.ro/hirek/file/61963573874.pdfIn PDF document text
    • http://americasbestwingsbeltsville.com/uploads/files/sakeko.pdfIn PDF document text
    • http://terralis.net/catalogue_dynamique/file/lafiwajaw.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/77822512685.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/12167261926135bda63ee60.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/66mpt4708essiqro7gkk79grbv/54231464884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=40+rudiments+pdfPDF 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_off0000d919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD919 18032 bytes
SHA-256: 1bbd68b9a5d70eec8e57188a191d5a8a159ffcfba64368d3d50ae766532189ce
font_01_sfnt_off00010744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10744 10532 bytes
SHA-256: 68300eef0ee8f9fa82a891f8179f27329d4ca7880a30f0cb2997a19a5e577e74
font_02_sfnt_off00011f3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F3E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1