Malicious PDF — malware analysis report

Static analysis result for SHA-256 24f5494b0949e078…

MALICIOUS

PDF

68.6 KB Created: 2021-10-04 00:13:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 0bc054766e70728901a6bdc702b0f6e0 SHA-1: 14e149bf43849c5907e001c85946de2d8adf339e SHA-256: 24f5494b0949e078d01ee7b24373a47f849467d858a7a38b232d24a4e4b9be6b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. ClamAV detection and ML classification strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://giteduguedesboires.fr/userfiles/file/wusosut.pdf In PDF document text
    • https://durgabas.coop.np/ckfinder/userfiles/files/guvoxekigevawenatugo.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/83111043793.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16138f7262090a---kaman.pdfIn PDF document text
    • https://hizlipin.com/calisma2/files/uploads/kawapuraj.pdfIn PDF document text
    • http://itps-group.com/uploadfiles/file/71601601589.pdfIn PDF document text
    • http://www.examnotice.in/uploads/files/pamage.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/borukezokanukogev.pdfIn PDF document text
    • https://hglobaltourb2c.com/FileData/ckfinder/files/20211001_D1F5ECC862CC4DAF.pdfIn PDF document text
    • http://ukkies.be/userfiles/file/82795192236.pdfIn PDF document text
    • http://shahnawazonline.com/uploads/files/zavimesibuki.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614b8889c13a0---jesir.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/60476944942.pdfIn PDF document text
    • http://hejia-ele.net/upload/50516744542.pdfIn PDF document text
    • https://eventpro-kontraktorpameran.com/uploaded/files/4362620665.pdfIn PDF document text
    • http://membranekeyboard.de/_data/file/21283757889.pdfIn PDF document text
    • http://sensor4you.com/fckeditor/editor/filemanager/connectors/php/fckeditor/upload/202109/file/karum.pdfIn PDF document text
    • http://ipsaix.com/ckeditor/ckfinder/userfiles/files/54066690502.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/xoxarewunazaluropaxalol.pdfIn PDF document text
    • https://mcgbaharat.com/userfiles/file/rivoragixuti.pdfIn PDF document text
    • https://purefeeling8.com/data/file/jogorerike.pdfIn PDF document text
    • http://e-baze.lv/images/site/file/2766518781.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=whitish+vaginal+dischargePDF 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_off0000b028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83F 10588 bytes
SHA-256: d6d5255d3b71dbdc87a8bf897aa91e6213f4dba77963158831887bd99e04bb11
font_02_sfnt_off0000e02d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02D 14708 bytes
SHA-256: 049edef88461af257967a4b344bec458c6a119d28af52bfcd748972de0b7ca18

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