Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3aae331b76ea2ee…

MALICIOUS

PDF

80.2 KB Created: 2021-09-20 19:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e8dccf9075bc3e6b596b2910ccfe3ccc SHA-1: 80cb17e528a4f376023e1a09ade69c3e80bd85f3 SHA-256: f3aae331b76ea2ee95acddd199a5171ed02d8306eebedb005b542d8815bb9558
104 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and heuristics indicate it functions as a link farm, directing users to potentially compromised websites. The ML classifier strongly flagged this PDF as malicious, and the presence of a 'download button' heuristic suggests a social engineering lure to trick users into clicking these links. The URLs point to various domains, many of which appear to be compromised WordPress sites or disposable hosting, further indicating a malicious distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://drafthe.ru/uplcv?utm_term=gemini+ganeshanum+suruli+raajanum+movie+download+1080p PDF link annotation
    • https://hv2barrier.com/application/third_party/ckfinder/userfiles/files/damazagapegul.pdfIn PDF document text
    • http://cantinachitarra.it/userfiles/file/696664677.pdfIn PDF document text
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c736aab933---nipaxaxenukozaxakujas.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1613836c30e414---50001990167.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/26868882577.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613244fc929e8---52678833651.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/banopezozokires.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16131c2aac55f4---35837445052.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/loguzoboravimodokifowaja.pdfIn PDF document text
    • https://bimetoor.com/basefile/bimetoorir/files/mefapuzumunop.pdfIn PDF document text
    • http://testsitehq.com/ckeditor-ckfinder-integration/uploads/files/22983318364.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/ropat.pdfIn PDF document text
    • http://sherwoodonionfestival.com/ckfinder/userfiles/files/10407026354.pdfIn PDF document text
    • http://lumieye.com/userData/ebizro_board/file/poreleguborifeminevilafo.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/49731008456.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210902062653.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/melipefagasovazoxajal.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/f7352a01536c7b97ead1d1d95fbf81d7/98491965558.pdfIn PDF document text
    • http://visit-pune.com/userfiles/file/sirejoxak.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/samakabozupixepowu.pdfIn PDF document text
    • http://aa-nusd.jp/tamojefus.pdfIn PDF document text
    • http://grafitym.kz/files/file/bitemiferibasedu.pdfIn PDF document text
    • http://irfanmakina.com/depo/sayfaresim/file/wudubulufadododez.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/82067637141.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD006 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e81d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81D 11544 bytes
SHA-256: cbd7546d87bae3a00d6344bfbdc11d82713a0a2adaefa722a7b548409e233a2e
font_02_sfnt_off00010319.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10319 18096 bytes
SHA-256: bfa4b4d1cfd7c7f9f1802a1f1124030d68d3709ec03aca79a63f172f8f099f1c

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