Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa2027b16024bd5…

MALICIOUS

PDF

126.0 KB Created: 2021-08-10 02:49:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: dd153d9e68d93ffc9ce1268acc38b491 SHA-1: bd6a370bd9374eac92ed0218a56ca13b1d83c586 SHA-256: 1fa2027b16024bd5d7e905ad14fc1c30d0398902f25e05587860fc4fb95f093d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous external URIs and link farm patterns, indicating a likely phishing or malware distribution attempt. The presence of multiple compromised CMS upload links and disposable hosting further supports this assessment. No scripts were extracted, but the overall structure suggests the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://oniceh.ru/uplcv?utm_term=roblox+eren+shirt PDF link annotation
    • http://rafaelokazakov.com/file/70484139300.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/38130241357.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/41753777431.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16098af0178f2f---64504624214.pdfIn PDF document text
    • https://jaurrieta.net/USERFILES_JAURRIETA/files/salukamebomarolulomib.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d0655b74633---zojevepokamode.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805170099d9---bovabazulikowokajujaw.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160891a7609086---61008567232.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/4dgs1nhqcgiiudk2arq50j8076/wefudibu.pdfIn PDF document text
    • http://hawks79.com/clients/85064/File/refesebum.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc01eeefbd---18429834193.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bb89aaef275---62187367005.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/tunigifikud.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/seluvenadilojepujamudarel.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dabae65e8---sasuweko.pdfIn PDF document text
    • http://axwelindia.com/uploads/25017434123.pdfIn PDF document text
    • http://flemisterbauldingfamily.com/clients/8/82/82a21d9598fc66f9117a8fb7222c8fd0/File/44158016907.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160950d759c125---25513088224.pdfIn PDF document text
    • http://speckrepeg.by/UserFiles/files/likezoxujiro.pdfIn PDF document text
    • http://pitafest.com/clients/1/13/1337b7689af00ddd847345d48bd720ff/File/ninuzonuxibasutokeno.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160723b908ce23---xomikaxinugidi.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021072006164270554.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F35 4936 bytes
SHA-256: 103a92ad4073fab60d9f0eff46a68b83537b112715267a1834c29108113458ba
font_01_sfnt_off0001813a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1813A 10332 bytes
SHA-256: 4273d9db73ed3a110561fd77b02c020b8638fd2d85f6af07bda79891c0fe208e
font_02_sfnt_off0001987a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1987A 22160 bytes
SHA-256: 8e210d232f9d29ff873bfa40c7d7c0ee0589009396886207826b7a376f431fd4
font_03_sfnt_off0001d1ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1AD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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