Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cc7e9ecd40cd57a…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 01:20:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be854d1c0a2a0501c76181b8db9a1e14 SHA-1: 5ab5b763dfc55cb8805c14935f4f0d4ce457f546 SHA-256: 7cc7e9ecd40cd57a654eb12b2c3c5fa9b2e8f4de1ec8ac836d874c502fd9b079
204 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, many of which are linked to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'SE_CLIPBOARD_COMMAND_LURE' indicates the document instructs users to paste content into a command-line interface, further supporting a malicious intent to execute commands. The ML classifier and ClamAV detection strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • 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.
  • 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.
  • 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://ketchas.ru/uplcv?utm_term=windows+7+home+premium+free+download+32+bit+with+product+key PDF link annotation
    • https://armagedonspedycja.pl/files/file/sunomekapupud.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/namidimigawoveseda.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab5e661499---41927350654.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/t8stp329oahd1batmn08rd0s70/palefelevizisemafug.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7c426a18d6fa874c2601b003d3b3f88a/poxadadegumubup.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16097dd3f811e9---55548870635.pdfIn PDF document text
    • https://rubfila.in/files/file/punagopulawuresatafi.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16088185630434---60249831726.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/8b5105968be278bfd7800093c5b09293/femudiva.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/jofuxefojotikafonojo.pdfIn PDF document text
    • http://kimbuunguyen.com/uploads/userfiles/file/3631228970.pdfIn PDF document text
    • http://pereplanirovkaoblast.ru/pict/file/ragatifarelakanibe.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/bgok1q88qou7qkf8u0vlf6j872/58152123865.pdfIn PDF document text
    • https://eyetracking.pl/userfiles/file/nobimenozokevibetazogupi.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/34408539776.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b479ecc100b---tosulagobezudixires.pdfIn PDF document text
    • http://dobryremont.pl/ebobas/portal/app/webroot/img/tmp/file/162062728062.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3605957d4---vidimipufavetoz.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/71998483568.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/17e0587b4c88164c6622cf87e3e360a0/74082970254.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/1162819219.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/59445830176.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b802e3b72b3---44028998603.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_off0000db25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF337 18476 bytes
SHA-256: bf8fa0df82778a2dc0d430dc89b8903023e4b6fed7ffc0f86ef3090db025036e
font_02_sfnt_off00012352.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12352 11752 bytes
SHA-256: 668fdc0a9310466c492f05212fdcdb2c9d9e2e6da85a03845e2be129a361745f

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