Malicious PDF — malware analysis report

Static analysis result for SHA-256 341590de5dec5054…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 14:11:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1adf2712535ede51fb7fef9ff5a84a4d SHA-1: e329d8680b39b9592ce0ddb40f7861bfed9e17bd SHA-256: 341590de5dec505436ca67764ff7ce72e2cba243231ccd9a18ebb6f1025d04eb
196 Risk Score

Malware Insights

MITRE ATT&CK
T1059 Command and Scripting Interpreter T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by a machine learning classifier and ClamAV. It contains a 'clipboard command execution lure', instructing the user to copy and paste content into a shell, which is a common technique for executing malicious payloads. The document also hosts numerous links on compromised CMS upload directories, suggesting it may be part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865028984f2---27505729004.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607751c0c0e39---95667917122.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/f2e78ca52833d59f3f7c260ae435d5e4/19884737071.pdf
    • http://goldenbaycruisesagent.com/userfiles/file/xuxupelazo.pdf
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/4d437811ce537d572a8f2adc8b17a66c/xalarutumumisogibimubital.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/giarmr8opp9pcn71tjl41nv57o/41421496340.pdf
    • http://hrudolf.com/userfiles/duvuwibezasapebeworakol.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ff577aa05---kifufilijujejajesu.pdf
    • https://ntct-dz.com/ckfinder/userfiles/files/73877037306.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e0e2c07381---miwizijigipokig.pdf
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccb5936b02---dapugokezopolimesule.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160cd38ec384de---52120606582.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d074045b7cd---30189869015.pdf
    • http://omonetach.pl/foto/ilustracje/file/58920008614.pdf
    • http://capital96.com/userfiles/file/17066785016.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baeb53455c5---gozojiwamanupapiride.pdf
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa3e8cb325---3627378954.pdf
    • http://france-ex.com/49408130460.pdf
    • https://big-affaires.com/img/pics/files/kisul.pdf
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/79199676104.pdf
    • http://intergeored.com/upload/File/zalelamajagowuxixiwu.pdf
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/b154fb498d30cefe9620c7650b4ae484/40084026666.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b55c2617a2a---bonedofetaga.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=words+that+start+with+x+to+describe+someone+positively
    • 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_off0000eb10.bin
59bb42d088ea913285ec3f1cc8a68c0d4baefd5e3fc3e5a064d2d493de4c1adf
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 17192 bytes
font_01_sfnt_off000117dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x117DD 16792 bytes
font_02_sfnt_off00012ff4.bin
835b633b88920323fe6d88569449a03507a7dc3e86c83fc8fdf5eb4e4c82e600
pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF4 11280 bytes