Malicious PDF — malware analysis report

Static analysis result for SHA-256 662998e681e75e9c…

MALICIOUS

PDF

72.5 KB Created: 2021-09-29 05:22:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5cf5f55646f2f79e8e1ad26e34e23eee SHA-1: 30939e32c7372d073a05e66011407230df02c41c SHA-256: 662998e681e75e9c6f7b2be96b2230eb57317fdaab4b2a3c5dbb5f8eca144d13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, embedding a large number of URLs, many of which point to disposable hosting. This suggests the primary purpose is to redirect users to potentially malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ttc-investco.com/img/files/gezutatajosomoguz.pdf In PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/makora.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210929012402.pdfIn PDF document text
    • https://portugaliaimagyarok.com/ckfinder/userfiles/files/14411634495.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/wategivawegemibop.pdfIn PDF document text
    • http://christ-china.com/filespath/files/20210919143110.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/xezosijeritalupakinug.pdfIn PDF document text
    • http://nj-rshb.com/v15/Upload/file/2021929844292881.pdfIn PDF document text
    • http://zajazd-broadway.pl/galeria/file/82389844904.pdfIn PDF document text
    • https://angelsforwarriors.org/userfiles/files/45098318416.pdfIn PDF document text
    • http://agavietnam.com/img/files/boraritoduvatuxokuxewakeg.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/29368005366.pdfIn PDF document text
    • http://bayanairag.com/uploads/userfiles/files/39089252317.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/risukojujemesozodunuxes.pdfIn PDF document text
    • http://www.jysunshine-hotel.com/up_files/file/wusebafibi.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/13841957487.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/dutibata.pdfIn PDF document text
    • https://portalkucharski.pl/app/webroot/media/files/49713749171.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/51048562904.pdfIn PDF document text
    • http://justsayhi365.com/uploads/file/lexol.pdfIn PDF document text
    • https://shevtsov-art.com/uploads/files/76150518030.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614da4aa412c2---86771552644.pdfIn PDF document text
    • http://philipp-haberland.de/images/upload/file/3770473524.pdfIn PDF document text
    • https://www.moxiclear.com.au/application/third_party/ckfinder/userfiles/files/64041288674.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/81826329656.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=omerta+full+movie+download+720p+blurayPDF 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_off0000b49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49F 17556 bytes
SHA-256: e7e3259ae57b3f973228e2a9a1bcc72e50ae9fc9dc1948b047e648d8d4b3eb28
font_01_sfnt_off0000dfdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F2 11312 bytes
SHA-256: 6d9761dea29c56ed30ce274751a07b81773625d55e62b1c5edb3de52861faf5f