Malicious PDF — malware analysis report

Static analysis result for SHA-256 d772878aa5800668…

MALICIOUS

PDF

87.6 KB Created: 2021-09-05 12:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a8b94def0bf19fa678b73d66afbc0637 SHA-1: 37bd9f84fd448d5b3c269532e3c2a8ef5cff4d54 SHA-256: d772878aa5800668fea61a4dd5aca962234c459bc1e34dd627212eec5a21b778
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or trojan payload is intended. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://agendatourvietnam.com/hinhanh/file/40814010581.pdf In PDF document text
    • http://xn--hazrdner-r4a10d.com/alisveris/yollanan_resimler/file/wemipo.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607894caa274f---85071694920.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/dabinor.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/vmq2bl3lj3ehcfrc1kkc3jopbt/nefowukigetan.pdfIn PDF document text
    • http://amandamaitland.com/images/file/lifopegibave.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608a98ae31af9---67530643281.pdfIn PDF document text
    • https://iasvn.org/Images_upload/files/wofuxufixejeriwibuj.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b5bf9d31f---zuvezujusibudoto.pdfIn PDF document text
    • http://lamekatus.ee/uploads/ckeditor/files/bisixixavumegodaw.pdfIn PDF document text
    • http://al-farh-iq.com/upload/userfiles/file/zegenupetokadofafusokos.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/dugow.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/jowos.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16087571e89bff---92751971920.pdfIn PDF document text
    • https://arredamentigiacobbe.it/file/firuruf.pdfIn PDF document text
    • https://media-get.com/userfiles/files/mepuputejewiz.pdfIn PDF document text
    • https://izometal.net/mm/file/16263620658.pdfIn PDF document text
    • http://remobudostol.pl/pliki/rujupubuxitowufavilotu.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/zasarikebafizaxukedajime.pdfIn PDF document text
    • http://exoticland.bg/upload/files/files/doputuvutiguj.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/65223151403.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210828045213.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/glic9ct70mbtp4qck04tnlms9j/35872866787.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16070510415870---sesiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=%CE%BC%CE%B5%CF%84%CE%B1%CF%84%CF%81%CE%BF%CF%80%CE%B7+pdf+%CF%83%CE%B5+word+%CE%B5%CF%80%CE%B5%CE%BE%CE%B5%CF%81%CE%B3%CE%B1%CF%83%CE%B9%CE%BC%CE%BF+online+freePDF 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_off0000e142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE142 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF954 22284 bytes
SHA-256: 17938d01fcebb5ca8c540401f6b39f88ca304c27993cecd163ef1c888e1d2a66
font_02_sfnt_off00013215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13215 11476 bytes
SHA-256: 2f45081cff9f6988c6c2a1324cf4b2dc9009004faeefba92801a3d35744333f8

Open this report in the interactive analyzer, or submit your own file for analysis.