Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e90ee2a6f1a6f38…

MALICIOUS

PDF

81.4 KB Created: 2021-09-20 09:57:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: aa12f7d2a22258b84d77138f121b2d8f SHA-1: 6e92b88ca885bd8833901124b8bcf7848937e80d SHA-256: 7e90ee2a6f1a6f383c8295ff2abc8b609576fbb7247dab1b95d763f5b865146a
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. The heuristics indicate it functions as a link farm and contains a callback lure, suggesting it's designed to trick users into contacting malicious actors. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://esistore.be/userfiles/file/wuvutoxoperegujevesafib.pdf In PDF document text
    • https://hotelcorona.ro/files/nejodidipeki.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/21308466574.pdfIn PDF document text
    • https://rockeit.com/userfiles/file/jememijexenubedidovebo.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/71787690337.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/46757492042.pdfIn PDF document text
    • http://korea-labels.com/ckfinder/userfiles/files/3731802646.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/nipagasedazodarozu.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/34194030577.pdfIn PDF document text
    • http://trumoi-khutrung.com/upload/files/buduzeramorebaw.pdfIn PDF document text
    • http://colegiosantarosa.com/uploads/imagem/file/sakamogeparorawozawilubuk.pdfIn PDF document text
    • http://ouhkpthaa.org/userfiles/30589699558.pdfIn PDF document text
    • http://jmestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dopawepokosowowelisabep.pdfIn PDF document text
    • https://studiopros.com/userfiles/file/In PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/421011123.pdfIn PDF document text
    • http://csp.hu/editor_up/17702583844.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/28021712409.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/90987498786.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161303c5a4d1c1---95303756996.pdfIn PDF document text
    • http://grafosaleservice.cz/images/fck_editor/file/47981277651.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210915180742.pdfIn PDF document text
    • https://www.groupe-coelho.fr/ckfinder/userfiles/files/bofuwugaxomut.pdfIn PDF document text
    • http://emannsltd.com/userfiles/41783486652.pdfIn PDF document text
    • https://perkunasstudio.com/uploads/files/202109120825566965.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/27412931382.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=state+and+action+verbs+worksheet+pdfPDF 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_off0000d63c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD63C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ee53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE53 11132 bytes
SHA-256: 16f29fb3447f423a536f41d23e37acc8e30dc6395cef0c0d7d7dbf13549b7000
font_02_sfnt_off00010813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10813 18032 bytes
SHA-256: f5a8dba1e8b73f991b44ad73c27210af8bfbd15fe0ecf484b0b903fc3f1fe4e2