Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f80157df20ce70…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 21:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: a24a890ed8c7a2718e6b353e7b1e151c SHA-1: 316e11d233daf83573c4b2bebb796e60de0d507a SHA-256: 02f80157df20ce70af57263d3f0fa0e4594db327d37170ba757b583f1e16e888
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to manipulate search results or redirect users to malicious sites. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the structure and URL patterns suggest an attempt to lure users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 5

  • 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://icltindia.in/userfiles/file/wozobuvavet.pdf In PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa972d0c956---45172971090.pdfIn PDF document text
    • http://harlit.com/ckfinder/userfiles/files/20210804_042409.pdfIn PDF document text
    • https://jyapa.com/jhuoyue/uploadfiles/bajumuzorugade.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/ravirajekiwekuzasoguzar.pdfIn PDF document text
    • http://loadcell.vn/Images_upload/files/30106875015.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/81961400999.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/27258321413.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/33386277420.pdfIn PDF document text
    • http://www.otevrenysklep.cz/ckfinder/userfiles/files/bobisusikaraxiwu.pdfIn PDF document text
    • https://ancoraeducacion.com/images/3846071274.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/lujaxamefovevadop.pdfIn PDF document text
    • https://www.kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/37253359664.pdfIn PDF document text
    • http://peak-experience-europe.com/images/blog//file/15993502984.pdfIn PDF document text
    • http://connect-senior.ch/uploades/userfiles/file/xugagotojurujetebukevedo.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7921fc66d9---47998536685.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/ralefabagavobib.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/xuromewezejawuzi.pdfIn PDF document text
    • https://economiadecomunion.com/ckfinder/userfiles/files/39447666186.pdfIn PDF document text
    • http://lovemyskindayspa.com/clients/d/d9/d99ed7cf7cbac978b7326c22a81d1608/File/safalumujamipuburunoguvew.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/47309801196.pdfIn PDF document text
    • https://rarahil.org.np/ckfinder/userfiles/files/muvuba.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/h8hijvfui48j2pep8dd2ofues1/zoxipowabenanajoxevejovud.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/damov.pdfIn PDF document text
    • https://limsurdua.com/contents//files/vomuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=asmodus+minikin+2+manualPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bf1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d72d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72D 16244 bytes
SHA-256: fddcbe21bdf9fb2753729b4ab5b26d7a3fbb01e3fe51d41ab0725360e25c189d
font_02_sfnt_off0000ed17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED17 20600 bytes
SHA-256: 37630ae3433feee045c8fb1a911f1070bb8d9fd62e9456cf9a334e4f89709de6
font_03_sfnt_off00012150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12150 10372 bytes
SHA-256: 385d2881f38f56cca77cda8b403f648cfa0251a6f8dd6368c0a2066c4a44cf6b

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