Malicious PDF — malware analysis report

Static analysis result for SHA-256 238dd203cb4a211c…

MALICIOUS

PDF

98.3 KB Created: 2021-09-03 22:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bcf10650fc88a32d4f141bd79fc6c0c0 SHA-1: 3bb16c843e67528752759fc1abe4d30a0123a971 SHA-256: 238dd203cb4a211c6595289fca981134c5af5b6b8392bebe31d2c054032818aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or malware distribution intent. Heuristics reveal it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. The presence of numerous unknown URLs strongly suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://qlinairnv.be/userfiles/file/63649468915.pdf In PDF document text
    • http://fairway.cc/images/blog//file/56226277840.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160c40dc3d11ef---sesifurinewosusuvata.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16090ac4dc8fb4---58094928650.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/47801346820.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1611df2f2ddf38---betitulozogegefafezapane.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/rogutifimovibizofipavimol.pdfIn PDF document text
    • http://hkalc.com/userfiles/tajidikok.pdfIn PDF document text
    • http://fzsvybbs.at/userfiles/file/4910956465.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///luwoda.pdfIn PDF document text
    • http://studiorinaldibedin.eu/userfiles/files/94874926355.pdfIn PDF document text
    • http://reklama-kemerovo.ru/files/files/nitarixaresugojusexow.pdfIn PDF document text
    • http://ettermanenterprises.com/ckfinder/userfiles/files/48924789959.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16117fe41ae874---fonatibowewulowuninunolej.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/43154e3c0e0e3eb473c6856eeae9c9e9/kadopagutogafijife.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080273f79723---5568697951.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/26f4fdfab230512cf9e9a81b98d2b224/semakenopor.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16126f2e5d9747---16403616657.pdfIn PDF document text
    • http://madiagranitosilano.it/userfiles/files/benepu.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/bolupolulimuvirujufuba.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/xesepogavefamenewonod.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/ribadobanexuwilaragugomig.pdfIn PDF document text
    • https://phatgiaolongan.com/upload/ckupload/files/zirutumatuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=infiniti+qx56+2006+manualPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000119ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EF 10696 bytes
SHA-256: b19cd1b9c4a48955c3bfd345a182ee9ee635df8aafeabbdf4474690a9ca20608
font_01_sfnt_off0001328a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1328A 18596 bytes
SHA-256: 31e6db4ba617532ae06b3230ddb9012fe4aa61edaa1701eda505ca56d0ded230
font_02_sfnt_off00016323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16323 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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