Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6df7b34dd4b418b…

MALICIOUS

PDF

72.7 KB Created: 2021-09-16 07:13:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 38eba05ca965e5d7933cf26dc6240c36 SHA-1: 3b94e24398d89cbb66bfa7a3a5837d9243e9cbb7 SHA-256: e6df7b34dd4b418b9f8f930d29bf165efac339b946232ba89e87ee15591f89a8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to PDF files on potentially disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior. While no scripts were explicitly extracted, the nature of the embedded URLs and the PDF format itself often implies JavaScript execution for redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://galeriejacqueselbaz.com/userfiles/file/42054825320.pdf In PDF document text
    • http://velapower.com/glwh/UploadFile/file/2021090801475573499.pdfIn PDF document text
    • http://kasargod.net/uploads/file/telewosubagepikufijof.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/28692121138.pdfIn PDF document text
    • http://cocoal.com/uploads/file/dakipe.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/16957936642.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/229b997913dbbacd1106f61f50a6174e/49986798132.pdfIn PDF document text
    • http://spokoino.ru/i/upload/files/fadujimeworelikafuladale.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/56781230970.pdfIn PDF document text
    • https://cristalparkhotel.com.ve/ckfinder/userfiles/files/6143120881.pdfIn PDF document text
    • https://escaletravel.com/userfiles/files/sutorozuvawezejozanumeso.pdfIn PDF document text
    • https://classconnbio.com/img-jacson/files/nizakimikafeji.pdfIn PDF document text
    • https://norservis.com/files/files/mamebu.pdfIn PDF document text
    • http://salespate.com/userfiles/file/49434940396.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5d090974d---logarinoxizoz.pdfIn PDF document text
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/ligoxorupezomujamogagof.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/xetoraferezavejanomi.pdfIn PDF document text
    • https://pepinieramontana.ro/ckfinder/userfiles/files/3210538730.pdfIn PDF document text
    • http://hzzxtl.com/UploadFile/file/20210903130452932.pdfIn PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/fuvevamesenokesawonevub.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/60825357774.pdfIn PDF document text
    • http://benthanhsgfarm.net/images/uploads/files/zimemokaturenosovibadedi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=all+danganronpa+characters+v2PDF 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_off0000b94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94E 16476 bytes
SHA-256: f0ced5f1ca3ba5b31a6b6f7997833ba3666e9659eb9747b1ae08ecfe7c5ecd94
font_01_sfnt_off0000e401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE401 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC18 10868 bytes
SHA-256: 938d62ef43e850bacf56ffd974c3bc3f112f0909df22382efb497586b3a57018

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