Malicious PDF — malware analysis report

Static analysis result for SHA-256 176affbc50a036b9…

MALICIOUS

PDF

70.5 KB Created: 2021-09-27 04:04:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c207d104330b0453f31369c0f83c9f85 SHA-1: 3294c4de9f39771ede7d48610fe88c0172392e87 SHA-256: 176affbc50a036b90ba5cd83f863d02e035abf077c37ca5f990ec5f243bc2a52
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV and an ML classifier as malicious. It contains numerous embedded URLs, many of which point to disposable hosting and are structured as link farms, indicating a phishing or malware distribution attempt. The presence of external URIs and the overall structure suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://philabc.ru/uplcv?utm_term=biohazard+4+mobile+resident+evil+4+android+game+free+download PDF link annotation
    • http://colokit.thienlonggroup.com/Images_upload/files/62126087775.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/baf20e0756d362dd56906862e2c4e53a/26656608670.pdfIn PDF document text
    • http://winkeleninzundert.nl/uploadimages/files/mujoxepoputixexoxopan.pdfIn PDF document text
    • http://highendschmiede.de/highendfiles/file/bosavomedetibi.pdfIn PDF document text
    • http://my-hustle.net/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/92043633003.pdfIn PDF document text
    • http://szwygs.com/upload/rezafavedixosisipeto.pdfIn PDF document text
    • https://arrad.ch/modules/ck/ckfinder/userfiles/files/kesivolut.pdfIn PDF document text
    • http://jinwoosmc.com/userfiles/file/75447697910.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/lawexebelatuzopow.pdfIn PDF document text
    • http://hvezda-pardubice.cz/files/file/29820620877.pdfIn PDF document text
    • http://instalater-macecek.cz/klienti/devel/sneznerolby.cz/ckfinder/userfiles/files/jelagemo.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/taduv.pdfIn PDF document text
    • http://fine-trading-knotwork.com/uploads/media/75433679949.pdfIn PDF document text
    • https://path.mn/userfiles/files/87797341417.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/43875984453.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/filedusenifipenepax.pdfIn PDF document text
    • http://bfttacg.marketsearching.com/upload/files/48729059975.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/zedaduzokakijilidededif.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/17352355459.pdfIn PDF document text
    • http://hp-cnc.de/uploads/files/buwagakop.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/50925882596.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/dizugemigomedo.pdfIn PDF document text
    • https://www.fyna.com.au/application/third_party/ckfinder/userfiles/files/lakakoririvipozitomejuva.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_off0000b0b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B7 11284 bytes
SHA-256: 5c667393f528f666f8a4799db2d57bab5986364d4144ecf0adeeda101573c3a8
font_01_sfnt_off0000cafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 15224 bytes
SHA-256: f0a5a8aa8a5ab6717295a99661af6f4e1541cd349abd795d6a2c9c3cd61e4a37

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