Malicious PDF — malware analysis report

Static analysis result for SHA-256 358eaf17dbe93356…

MALICIOUS

PDF

91.3 KB Created: 2021-06-28 21:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4c212209dafe1333843bce445963399 SHA-1: 411e29c9425703a49ecff55f1fc1de57fbcd4335 SHA-256: 358eaf17dbe933567709fbff9dd3afb3b6a6ea9714b88a0e8e725c7e3a4a7ac2
204 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. The 'SE_CLICKFIX' heuristic indicates it's a social engineering attack designed to trick users into running commands, likely by presenting a fake download button. The document contains numerous links to potentially compromised CMS upload storage and disposable hosting, suggesting it's part of a link farm used to distribute malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://marthomaiticherukole.com/userfiles/file/xadugofewumivitofarona.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/70cf3c28ed569b4fd02f54b53f3721e8/zajuzakavefa.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2dc3387191---kesakexazilose.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/1a4213ba80e77797eb397ac31b4094fd/gowevedopibagerediti.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160853b8a0c68d---debibapirex.pdf
    • http://bodymindspiritconnection.org/clients/5/53/53f1eac0d8ee32431a47b4e1af774f29/File/matebewamelopanufal.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abd25641bdc---45845549033.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070ac7e05a82---figefumujifisike.pdf
    • https://ajur.rest/uploads/userfiles/file/kawobujorufo.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/mflos8mic4n8i9b7ois4blvo6g/rabonitozaromi.pdf
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/da6c3d126b348837686a0406873aba69/nujaropomal.pdf
    • https://anukulagrotech.com/userfiles/file/83040577739.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/lql41totdus6bd6fmnf3gclba5/4234073936.pdf
    • http://kayapaliinsaat.net/file/36296754707.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/ai886f862m036hr8tvd8hg1ta5/26995521518.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcb0e6b45b---55009690402.pdf
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160addca595150---64680297622.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/d4e9bfd873b539e4831cf2763da2fd6a/fotuwewegatosu.pdf
    • http://suarezbeltran.com/aym_images/files/lukumex.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/o3ec78obnd5511ela4nuetotpj/36195295690.pdf
    • http://timebymtm.com/upload/files/jetupamukasewon.pdf
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16086053cba6e1---tanumibezalirom.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/o1ehpeg2rcmefj3pim9jotutmh/sowusosulabibipowevax.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/0lv1o5h45uae8povbfoeudom0r/dibaw.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=no+teredo+in+device+manager
    • 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_off0001020e.bin
47ced89e297f4d000a21cba7b9c18afffccbc3c39683d7dee4e6950d36ab80fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1020E 10540 bytes
font_01_sfnt_off000119e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119E0 16792 bytes
font_02_sfnt_off000131f2.bin
8ef31f59fa2b220c220fb2f88908f34d985db597714d43361c54ee3f0782a797		 pdf-font-stream PDF embedded font (sfnt) at offset 0x131F2 17492 bytes

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