Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e1297c299059d1…

MALICIOUS

PDF

77.5 KB Created: 2021-09-11 00:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e2f4f2a84be4372cc3ed4a8584ee9424 SHA-1: 899e29c3316d848c2f8963f650b82034100b6f5d SHA-256: b5e1297c299059d123743ad3dee0d3c308dcf4263bf0cc08db3f45b189b2a46e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for link farms used in phishing campaigns. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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://chaputlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25734552051.pdf In PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/48464926627.pdfIn PDF document text
    • http://mdfgiare.com/upload/files/letama.pdfIn PDF document text
    • http://regcureguide.com/files/files/tusumarelimeteraloxofagep.pdfIn PDF document text
    • http://linpus.com/app/webroot/userfiles/files/sepomamakovozaremog.pdfIn PDF document text
    • https://noithathoaphat11.com/upload/files/44334891827.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/76044222845.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/68082429661.pdfIn PDF document text
    • https://netlandschool.cl/files/57748826774.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/babagusiwijife.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210902020739920.pdfIn PDF document text
    • https://hurghadalife.net/userfiles/files/situteveni.pdfIn PDF document text
    • https://confidence-ist.mktechsol.com/ckfinder/userfiles/files/70589217582.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16136c7282ca8a---25632898533.pdfIn PDF document text
    • http://thuexedanang247.com/uploads/image/files/tuwenanumasagi.pdfIn PDF document text
    • http://amicissiapiemonteisa.it/userfiles/files/42585937286.pdfIn PDF document text
    • http://hasicimosnov.cz/foto/Image/file/kiselotinu.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/6425119499.pdfIn PDF document text
    • http://artgraf24.pl/userfiles/file/xalujubami.pdfIn PDF document text
    • https://corcreation.twbiz.me/data/fckeditor/files/20210902_234523.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/nemixoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=worksheet+of+noun+for+class+6PDF 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_off0000cb65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE377 17552 bytes
SHA-256: 16ca8941e66616d0e827205a6c5e98ea36889031436e42a6d5cc13e82ee037f6
font_02_sfnt_off00011040.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11040 10692 bytes
SHA-256: ac238289355f7256510bf3cef83071cef398b8aa1e8f7ca06c0016b5f9e4e226

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