Malicious PDF — malware analysis report

Static analysis result for SHA-256 be75a03b124bbe01…

MALICIOUS

PDF

74.3 KB Created: 2021-10-05 22:54:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 48ffee4585a2cc66056ff8abf4149bf7 SHA-1: 2f40ea71fd21e9deffa7561c6bbc116291eaa5c3 SHA-256: be75a03b124bbe01091def89bc053c9a456c9f13ed3b524e821367b3fbfae248
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised websites or are structured as link farms, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The file's structure and URL patterns are consistent with a phishing lure designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://familienbilstrup.dk/userfiles/file/65284129575.pdf In PDF document text
    • http://mea-travel.pl/userfiles/file/52156176210.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/ogqbfae3i9gqn5s9cqflgmm5qs/lidimetujijetoveroxati.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/7925797193.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/rudojijabupobijekutez.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/14814157632.pdfIn PDF document text
    • http://hfnhsw.com/upload/files/71809617514.pdfIn PDF document text
    • http://mannadey.in/FCKeditor/file/sujelufi.pdfIn PDF document text
    • http://narzedziascierne.eu/Upload/file/49308880948.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/93814572436.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/66093178180.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e847a681a283c79941cc4c4f793de842/fuwik.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/81729784150.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/gogoxetobiviwajimukivotu.pdfIn PDF document text
    • http://hhoasis.org/app/webroot/img/fck/file/sofimafotikugipogax.pdfIn PDF document text
    • http://basse-normandie.annuaire-regional.com/ckfinder/userfiles/files/58202901107.pdfIn PDF document text
    • https://aakritidigitals.com/userfiles/files/jabopizekemaxefalemiguli.pdfIn PDF document text
    • http://merrygoldholidays.com/ckfinder/userfiles/files/modopalizujadewoga.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/zebux.pdfIn PDF document text
    • https://transport.frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/metafalozazelofina.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/161339ed3135a4---nemegixamulokoxupixugixij.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/029a47ace3aab756c9f139c5574423e1/tixivetemonifo.pdfIn PDF document text
    • http://dwornawodzie.pl/userfiles/file/makajadekatuxarek.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/67547270674.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=convert+cad+file+to+lower+version+onlinePDF 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_off0000bfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFD4 10652 bytes
SHA-256: 33a10cae2d4cdc5161c10b8f28a7aa0144902cf995c7bbcc1dc7b62ebd98f90f
font_01_sfnt_off0000d873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD873 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF085 16576 bytes
SHA-256: 273e3c1b5dd5b859fd3fe3ae5176a512f44c2422e302af9a686a4218515c73d6

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