Malicious PDF — malware analysis report

Static analysis result for SHA-256 15615e25320545b3…

MALICIOUS

PDF

83.9 KB Created: 2021-10-08 20:36:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: d433591eacb865de64f2942a32f00f0a SHA-1: 47c1b30c460b6653b929e199f95e42bb00869ad3 SHA-256: 15615e25320545b30df24ac2431a15638c1a0605b9859ded8f8607a01c6f6eb0
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and numerous links to external URLs, many hosted on compromised WordPress sites or disposable domains. The presence of JavaScript and the nature of the URLs suggest an attempt to download and execute a second-stage payload or redirect the user to a malicious site. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 9

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://laborke.ru/uplcv?utm_term=8th+class+science PDF link annotation
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/zuvajotu.pdfIn PDF document text
    • http://togul.org/sites/default/files/file/kagipilagogid.pdfIn PDF document text
    • http://zenobiacultura.it/userfiles/file///26204557237.pdfIn PDF document text
    • http://www.propper-droppers.nl/files/file/mexosekuzulasukemoraxe.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/68019247839.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/34d3609d80f260069416707df99077fb/lekifevimijejemajegesones.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/95355657603.pdfIn PDF document text
    • http://naplesredeals.com/userfiles/files/wixevitulojuselodawemurar.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/voweritawelu.pdfIn PDF document text
    • http://ji-tien.com/userfiles/file/wavugupibetoturadida.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/funafofisodavukaluzedoz.pdfIn PDF document text
    • http://agecarekorea.com/ckupload/files/93448170325.pdfIn PDF document text
    • http://shrlie.com/upload_fck/file/2021-9-8/20210908045753211208.pdfIn PDF document text
    • http://chinalabware.ru/d/files/xegozaroleritunavafabew.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/77681109238.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/46a88a4197057fb1230e8c564e943f87/gililuvexazedagikoxopok.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/32856368114.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/39934399973.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/amvrqf8ravmh2rfvhlfq5bm04p/2645990313.pdfIn PDF document text
    • http://bochkari1.ru/pic/file/11444026724.pdfIn PDF document text
    • https://dananeye.com/uploads/files/202110032238062735.pdfIn PDF document text
    • http://kibunajcc.com/ckfinder/userfiles/files/30490211321.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ccd5c2808b---ditaxokosafugapegezi.pdfIn PDF document text
    • http://studiosaletta.it/userfiles/files/15789617913.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/2284235060.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_off0000de48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE48 10220 bytes
SHA-256: 4e35641abeee6aec250cee9cadd603e6fae947243b312d54f900e649f6f3ad1e
font_01_sfnt_off0000f521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF521 20124 bytes
SHA-256: a4e31cd9fe95c9d1b6b0bd4b841ec7ef2edf2b14e4d3d83fc750ee5229f6315f
font_02_sfnt_off000129fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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