Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69456dd8e9db03c…

MALICIOUS

PDF

85.9 KB Created: 2021-06-30 00:01:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d2cd105cfeba07d67ebd5107200fa670 SHA-1: 5887d9f461855abae0d49c02c8e7983c23fcadf4 SHA-256: e69456dd8e9db03c65f63fc908ab79c9e3064d047a49732f328f8dd5b32906dc
196 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites hosting PDF files, indicating a phishing or malware distribution attempt. The 'SE_CLICKFIX' heuristic suggests social engineering to trick users into executing commands, which is a common tactic for bypassing security measures. While no scripts were directly extracted, the nature of the links and the 'ML_NYX_PDF_MALICIOUS' flag strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9765

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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 https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/uean9inhclsu44jbhpthnt15l0/pamifo.pdf
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/o38h8oobt9202qtmco72s3gfj0/fububasexukipozu.pdf
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/1ea7221859284fc0e82fa95b5bf3ca13/jitimadinonijorilogililif.pdf
    • http://usaoxin.com/userfiles/2021-6/file/fiwuropelafebavaxoturawa.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/29467dc73bc58779008b58ae976a8431/94620072798.pdf
    • http://koreanhotpot.com/uploads/files/komimuguzusid.pdf
    • http://technoculture.cz/admin/upload/file/7786092856.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/9cbbgjpteb4ojfaupn1ar7svvq/matuzitelimilexivedebutu.pdf
    • http://studioriggio.it/userfiles/files/lisufaxozapabalikip.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d658fa5a1e5---vawepilipopodanidelameban.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae7e52c355---bulepovikatawifitazazoron.pdf
    • https://mebelihome.ru/upload_picture/27810117358.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/1921b4e0097a3884a62c4d493e54df97/25869965211.pdf
    • http://camonetinternational.com/files/file/96235650681.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/751ee59c7a5b7da4bdb17634176ec587/7036380775.pdf
    • http://flynewsletter.com/uploads/file/86345669818.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c4c69e195---lekenexegijorokafido.pdf
    • https://angkoronetour.com/userfiles/file/66115655240.pdf
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/616061b3061c5b2a2ea0df6ca20fcd07/65838560922.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/8a2209823984af1966ffc1744e1abe1a/zuzonora.pdf
    • https://bibliothequedesarts.ch/ckfinder/userfiles/files/85005400714.pdf
    • http://bangtaisay.com/uploads/userfiles/file/dunavevoliremowiguke.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079102fb1edb---87231660214.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/phraok09dhisb4dqdsm83e49a7/52681691894.pdf
    • http://macabrey-luthier.fr/data/Files/lulumimimepapane.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc59c41349---ruwizazukaninubojineg.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=x+ray+vision+minecraft+download
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d352.bin
2f37ea1b11ece644fef2f420fc5d5e29c860255d372ec3a711666e2589675489		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD352 16204 bytes
font_01_sfnt_off0000e900.bin
4bb7b548613ddfe54f37d68e9cf95682f178725228cc8c496e3eb7c683a41a16		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE900 18200 bytes
font_02_sfnt_off0001182b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1182B 16792 bytes
font_03_sfnt_off00013042.bin
71aedb10baef756d541b1627294e15eed4333061021568d76ab8adddded67593		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13042 10908 bytes

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