Malicious PDF — malware analysis report

Static analysis result for SHA-256 126747d29932b8fc…

MALICIOUS

PDF

85.0 KB Created: 2021-07-07 20:35:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 985a8a8602d6550d90f3469016f4b244 SHA-1: 3b86a8f055cf030bf80dd83f1d8432963f8efdcf SHA-256: 126747d29932b8fcc0f24994d5aeeea4b5915b993c1c3994ca5259ad031625ac
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://ddshower.com/ckfinder/userfiles/files/21014456363.pdf In PDF document text
    • https://coebmsf.com/userfiles/file/78651778933.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/xorupaporarokubixuzi.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a44795b3533---latefedupixoboxolavetona.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/biguvowufezegexopi.pdfIn PDF document text
    • http://ahxxzx.com/userfiles/202104/file/16690605247.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/ab6d43605ddab80be97bb55bc62cd238/20291597672.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/tohosld1c0o5fss8ilguhv1v96/96635942749.pdfIn PDF document text
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/c81e4505221a21d0ce8ae456ea45bbe2/kepezulevogejuluwimagaw.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/83798807825.pdfIn PDF document text
    • http://krevue.cz/UserFiles/File/58033784082.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/549eac6d90462a3ebdfa306e324a7432/79399850215.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/ku9m9fsef1n5u2v4b0ikkrkf08/duxupaneborukidenulob.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89ebf4fc9a---betemuketiw.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/sitapojek.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb646c72b0---70403110590.pdfIn PDF document text
    • https://dpengineers.info/admin/userfiles/file/bidobagajekazolatatamadis.pdfIn PDF document text
    • https://areicon.com/images/file/wexomaxenotur.pdfIn PDF document text
    • http://ff-engineering.com/userfiles/files/bopilukuvabadul.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/79567141122.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/306a30bc8cb3b93a06dc1e2863365ffb/benakedogo.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3fdb517b9---giwugafuwotumab.pdfIn PDF document text
    • http://jestbogiem.pl/app/webroot/uploads/file/kisivupul.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=apk+easy+tool+downloadPDF 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_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 10464 bytes
SHA-256: b3813902711c174cdc06d8f9539b8dc553a75e50b881d0b50577e5bf21fad13f
font_01_sfnt_off000100fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FE 17356 bytes
SHA-256: 2a467bfbaac1b4bae8c085ae813c7b46e492272c503c3de658bc0b0feaaa4af2
font_02_sfnt_off00012ea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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