Malicious PDF — malware analysis report

Static analysis result for SHA-256 11626f67400fa4ad…

MALICIOUS

PDF

110.2 KB Created: 2021-06-26 08:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d0337fb4acfed8dbaf1a765954eb43e7 SHA-1: 7792c780bcd00f85cda8664f93868f26e9b97a08 SHA-256: 11626f67400fa4ada2e609bb3941d2ce61b1e4ce27e069a140d0dd40da5a2b40
196 Risk Score

Malware Insights

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

The PDF document contains numerous links to compromised WordPress sites, suggesting it is part of a link farm or phishing campaign. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document instructs the user to copy and paste content into a command-line interface, a common tactic to trick users into executing malicious commands. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download and execute a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9780

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.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16095b71c99043---3514572390.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/12d759195402fd3e824e839e77fb636e/21287984770.pdf
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608526a0d5d60---vopabisekofozibus.pdf
    • http://debandhelder.nl/ckfinder/userfiles/files/gifepifo.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71569a4507---vonapuzivepivufexadex.pdf
    • http://teplo76.ru/uploads/file/55127850504.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d52ddcd824c---2297557735.pdf
    • https://sitpchemcieszyn.pl/_sitpchem/file/9726483248.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d67aaa4aab---6507282111.pdf
    • https://conexkarvan.com/cache/fck_files/file/39808564531.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606e45fb075fd---94516841516.pdf
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a27c885d9aa---rirakapavawinareliveri.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b1c55e9644e---wikotatoxeruroxezebo.pdf
    • http://zonazero.es/userfiles/file/9780605381.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2e163aa42bf88b5b06adac1155c59e0c/salemegamegu.pdf
    • http://asahiru-ban.com/files/files/ragabojinuf.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609826d211429---fixibusijabutiloriwuk.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/1e63489024d8a9095c2114c6f7e3f2df/89507811976.pdf
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071521eb9534---leritezagurijosovinarolux.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/cf086002797da3c3f164a2b816a46186/weginu.pdf
    • http://auxerretv.com/content/public/file/tuxuxodamepejivaroxeto.pdf
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607098177c8f0---44395398529.pdf
    • http://holzbau-napetschnig.at/77257663476.pdf
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f256b7bc5f---80644186599.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f1860ecc0---vibikaziganosuziziw.pdf
    • http://stark-tools.ru/images/uploaded/36539429298.pdf
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/83658eeceae0f67cc55695ba4ba5011d/kudigovutusevi.pdf
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/d71afe7c21d5640ce910fbf400a1a6ce/39644421429.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=ligands+may+be
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014cc5.bin
238c475b9edfca9a18ea4dd53561f490f0c1e68442c2525d8c4d9e7487b758d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14CC5 10436 bytes
font_01_sfnt_off0001642a.bin
eba351b3badfa4ceb1b1159bdb6c3db28a19d5c021d71caf875b213b3759be6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1642A 18164 bytes
font_02_sfnt_off000193b8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x193B8 16792 bytes

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