Malicious PDF — malware analysis report

Static analysis result for SHA-256 7359fd40f3c78f10…

MALICIOUS

PDF

68.6 KB Created: 2021-09-16 18:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 33d7b18325e4411fd575134d56806c8d SHA-1: d2c37d55c90b89f931d077e1b4607f6aed097db4 SHA-256: 7359fd40f3c78f1001921799ebb9056d5cbf06a7a244c8f233f82105dc7060be
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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://smidgel.ru/uplcv?utm_term=fs19+download+for+android+apk PDF link annotation
    • http://qiangka.com/ckfinder/userfiles/files/jiraxid.pdfIn PDF document text
    • http://djapm.com/userfiles/file/88246725911.pdfIn PDF document text
    • https://drticket.ir/basefile/drtiketcom/files/85523987931.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/vubepigikovi.pdfIn PDF document text
    • https://profitaler.com/UserFiles/file/xajafigubozilakul.pdfIn PDF document text
    • http://ferien-in-zahren.de/images/file/15605021950.pdfIn PDF document text
    • https://fcksa.com/ckfinder/userfiles/files/riperane.pdfIn PDF document text
    • http://hart-metale.pl/gimnazjum/userfiles/file/jotatiwituxijawuvil.pdfIn PDF document text
    • http://naim.naparts.com/images/fck/file/buxopajuzamavuwuzijudo.pdfIn PDF document text
    • http://tageedesign.com/ssmpt/documents/file/nuwinobadaripixetulez.pdfIn PDF document text
    • http://palami.by/images/file/bavejutidibarupelimutuw.pdfIn PDF document text
    • https://museuminiaturesbesalu.com/files/42000955576.pdfIn PDF document text
    • http://tranindo.com/Uploads/userfiles/files/17641549011.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/84378083145.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/xixifefebinose.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388e70d31a4---levimow.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/pizoxexokanosoxenikupo.pdfIn PDF document text
    • http://cl-pub.com/files/files/jesit.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/31340798984.pdfIn PDF document text
    • http://molenat-energies.fr/molenat.com/images/editor/file/76052851364.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/fumazotelaxox.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109061715279708.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/72813481844.pdfIn PDF document text
    • http://sinners-party.de/media/file/xotuvepesatomigoz.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/83429651438.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161387fccbc028---mofasuvad.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_off0000b0c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0C9 10636 bytes
SHA-256: 39ab053cb9893da3fbbdabadac26443e499a6f81af24475d1eb0efe7a5814f99
font_01_sfnt_off0000c948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC948 14192 bytes
SHA-256: e967a23434df45ce6cd93e16deb33332f60090cf47774211a2f26f86f116d849
font_02_sfnt_off0000ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1