Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba60119c53ad8c0…

MALICIOUS

PDF

91.0 KB Created: 2021-06-26 22:53:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ed52c29dd0d5f8e8e3c034fa6c91764 SHA-1: 3c3dbc0ec92da97536eb4c7b0ee00af4eb1611f8 SHA-256: 5ba60119c53ad8c0fa72ce9dc2bcc0e801f79f6608934bad529705d4929c0190
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier. It functions as a link farm, with numerous URLs pointing to compromised WordPress upload storage, suggesting an attempt to disguise malicious redirects or phishing content. The presence of multiple distinct hosts and the use of UTM parameters in one URL indicate a coordinated effort to distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b740a5a2ce5---54319694545.pdf
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f4dd2c1c7---kakenipapolepefasukolax.pdf
    • http://topas.lt/userfiles/file/folaxexapadenax.pdf
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160893c2f26f29---50492018989.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/41b5153231a0f8b2f6167372ed5766bf/38980377806.pdf
    • http://sake2metustin.com/uploads/files/junawaporanetasivemorowi.pdf
    • http://growourworld.com/clients/83159/File/61204640965.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/3b7103802a5fac8c2fe200c3c1227dd6/mapawomakapekukusufew.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/42b27ebfb3c63c3a53e827a08a586546/pelefepuzekunil.pdf
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8e989ebc4---tabetebetosodeze.pdf
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/geldlp9hsjictqqbb5lrm1l8g3/43795871914.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073a28c63a62---80841377529.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ced99301b8---zusamutazozivoruwi.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b272b58bb62---nodupodi.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bee6b9742a---ziwararazex.pdf
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/158eef65748c01e1d4f2b39ca37f2422/zozazeneretebatimejoxig.pdf
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/9b14d59477c86269e5fb5f55cc306eb4/zotamorurupukigatubuwo.pdf
    • https://kartplast.com/resimler/files/80941344968.pdf
    • https://autosaloncenter.com/uploads/file/velotivewipuvigitetepem.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/68324175426.pdf
    • http://akcjonariusz.com/UserFiles/file/diguziwasari.pdf
    • https://isabellepieman.com/userfiles/file/zatadopuf.pdf
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16080bc95ae3bf---93140401157.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+take+off+metal+detector+on+clothes
    • 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_off0000ff17.bin
baa13e7230c09f78755d2839b6e176a8599571c0d101ae6121adff1ea70cac69		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF17 10820 bytes
font_01_sfnt_off000117e5.bin
103eefc7348ea70188d13536cb8828783028d76fd3e055cac8e02b0a135bc56a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117E5 17324 bytes
font_02_sfnt_off000144d5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x144D5 16792 bytes

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