Malicious PDF — malware analysis report

Static analysis result for SHA-256 2caad461314c147c…

MALICIOUS

PDF

97.6 KB Created: 2021-09-02 20:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2a585f87c470bc21d1a486c01bb6c0be SHA-1: 51529a28d016d190a05ad3b18771644e7ea14485 SHA-256: 2caad461314c147c31d38b4a257e0de0286ab21d381f96424a699e1ecd2bc05b
196 Risk Score

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a 'Clipboard command execution lure' heuristic, indicating it instructs the user to copy and paste content into a shell, a common technique for downloading and executing secondary payloads. The document also hosts numerous links on compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5e16a63b9b---53897511666.pdf In PDF document text
    • https://www.alugutader.fr/ckfinder/userfiles/files/82405686596.pdfIn PDF document text
    • http://skikk.be/app/webroot/files/userfiles/files/86893543092.pdfIn PDF document text
    • https://ovalpolycoats.com/media/bavuzuvidevaru.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161105f397842d---wokajodifadopenifevavozi.pdfIn PDF document text
    • http://componentcnc.hu/uploads/ckfinder/userfiles/files/zevomefedatukebe.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/7e1e59dtlb90idnod17sbp15a1/51686847586.pdfIn PDF document text
    • http://bcslaw.hu/admin/fck_upload/file/pusinewuzan.pdfIn PDF document text
    • http://littlefreddieking.com/clients/65037/File/nolipasijafe.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160757aca1064a---89439706103.pdfIn PDF document text
    • http://kroonzuivel.nl/ckfinder/userfiles/files/supukenedoxijata.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/21400348387.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/26726651079.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce4e714f2e---gofukikanijef.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/rasinivojujuzizifoli.pdfIn PDF document text
    • http://okeefesreef.com/ckfinder/userfiles/files/58206481345.pdfIn PDF document text
    • https://lacaune.hu/userfiles/file/tusixatogorewovodimul.pdfIn PDF document text
    • https://hostessima.pl/userfiles/file/71351355598.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b56f4b17441---61894118379.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaffb30e7b0---35471906367.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/kejomalexodamore.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/d285e01acee716dc0d8321e062eab202/bixagakedoratog.pdfIn PDF document text
    • http://www.valathors.com/ckfinder/userfiles/files/91834968981.pdfIn PDF document text
    • http://www.szphotar.com/admin/img/files/zedufokasajoxogejewo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=environment+definition+pdf+filePDF 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_off000114b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 10376 bytes
SHA-256: a424d2715c4580427f2b3ad3854d950f760c8d9292bf1f4ec197d12c01ab16b5
font_01_sfnt_off00012c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C1B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001442d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1442D 19812 bytes
SHA-256: 39547220b70e2e269bfc316cd66f14a185a87f8908076ec5a8689c1143a6e505