Malicious PDF — malware analysis report

Static analysis result for SHA-256 67f3796113ad794e…

MALICIOUS

PDF

70.9 KB Created: 2021-09-30 13:47:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 48d031e74b6264b53b195be2df1b2314 SHA-1: 1f2619e52eaf81a01a74c3531620089be17e43e1 SHA-256: 67f3796113ad794e661ebf6dabeb83fc293b13b1bdef174decdcab44fc9676e5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external links suggest it is designed to redirect users to malicious sites, likely for phishing or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=mp4+downloader+android PDF link annotation
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac2f7639ac---tinekolosodawita.pdfIn PDF document text
    • http://enidental.com/userfiles/file/20210925215612.pdfIn PDF document text
    • http://rioairporttransfer.com/ckfinder/userfiles/files/ludolipasibikosunaf.pdfIn PDF document text
    • http://iuf.kr/pds_down/files/3563711560.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/gorunaxevif.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/lawepibipagizej.pdfIn PDF document text
    • http://denetimmusavirlik.com/userfiles/file/68358699106.pdfIn PDF document text
    • http://strelnicebudejovice.cz/userfiles/file/5699375616.pdfIn PDF document text
    • https://hojoairport.com/images/file/gukuziwupapowa.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/pupuwuloniduvas.pdfIn PDF document text
    • http://awfiowv.love-mrt.com/upload/files/dipedaledo.pdfIn PDF document text
    • http://affordableadobe.com/ckfinder/userfiles/files/88903072810.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/46898825575.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/47170898859.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/58840812765.pdfIn PDF document text
    • https://akamercedes.com/images/uploads/files/pajuzojuzelozazivuzuzeman.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615575bae6520---44153264760.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///nivegopefa.pdfIn PDF document text
    • https://gymlesgeants.com/upload/editor/file/43358464313.pdfIn PDF document text
    • http://yummyschool.com/_UploadFile/Images/file/fapox.pdfIn PDF document text
    • http://brenna-ski.pl/userfiles/file/68640054556.pdfIn PDF document text
    • https://noriupapildu.lt/ckfinder/userfiles/files/90787000008.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/70348851295.pdfIn PDF document text
    • 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_off0000b001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB001 10276 bytes
SHA-256: 1d0303776745222b7a6f831020e0888fb4ecd63d4083703e62d4d39e1d78f470
font_01_sfnt_off0000c746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC746 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000df58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF58 18812 bytes
SHA-256: 7072ba8fb97744e378c25aa0521dbce6c92538789ffad94694a616e6a0b36bfd

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