Malicious PDF — malware analysis report

Static analysis result for SHA-256 74cc5152fb03409b…

MALICIOUS

PDF

97.0 KB Created: 2021-07-28 13:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0ff33d02bd8cbd3027962962794489a4 SHA-1: 12de65c7b48778e52fed0637f329d31d03f53aa2 SHA-256: 74cc5152fb03409b2130c385ffce4ca1c1336ef24cf58864f7c7443acc51a9e3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to obscure the true destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/qlofmprlglclv99vf5nbkr08nj/dudekaxinilefadowamogejop.pdf In PDF document text
    • http://ymy-tea.tw/upload/files/jawupejuxuderetavat.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608305f10b57f---kumuvexonixiguzavoxolimu.pdfIn PDF document text
    • https://mclarenquartz.in/ci/userfiles/files/lekabujapevopev.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/lafuxojuxujotika.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/jopixufubejo.pdfIn PDF document text
    • https://prokoncept.hu/admin/blogfck/image/file/84898486171.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/72836331619.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f6913d5c00b---nazibuwogukawemimowosuda.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/pexewunedok.pdfIn PDF document text
    • http://worldprint.su/userfiles/file/bukatadilazodowofosu.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/nke2b06ivg96mue2a7ekaed9sf/50473415755.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/cde85e16eef0065b1be383ee37f2b2c1/bixebetaju.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ac6ed616bdd---kenifewezidusopodug.pdfIn PDF document text
    • https://eltonltd.ru/sites/default/files/uploads/6500074447.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/wuboxegeditowumedubuseb.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c7815125e---tuvivutusanevo.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/gipavum.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1608423863e919---kasulufoxiruzadopetufik.pdfIn PDF document text
    • https://tisuputih.com/contents//files/rojivirabudisoxoz.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/fajatozerudidikezadu.pdfIn PDF document text
    • https://lederstuhlshop.de/ckfinder/userfiles/files/49484540979.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99f839bb5b---zavozozawugiforojek.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/powamoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=how+to+find+recordings+on+xfinity+remotePDF 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_off000114f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012d02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D02 17816 bytes
SHA-256: d16177c460d738ae533e7199bd93164f40797394615731ff574bbe6617da01e6
font_02_sfnt_off00015c11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C11 10904 bytes
SHA-256: b2226bf53f8c391a5993402b278da33dffeb81c830cdd507ee82b3d8a20cc9e0