Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d5297d62b3a1bca…

MALICIOUS

PDF

95.0 KB Created: 2021-06-25 18:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 7c61662b5fed9e9635906095ec6e2e10 SHA-1: 71f9c1e93314bd62533319a512e4f610e4eed543 SHA-256: 3d5297d62b3a1bcafefdffdd1b6dc45e4571288f06280adf25ed979d0f00d205
204 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution campaign. It contains multiple links to external websites, some of which are hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content. The presence of a 'remote-support tool lure' heuristic, combined with a 'download button' lure, indicates the document is designed to trick users into downloading and potentially executing a secondary payload. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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 https://philabc.ru/uplcv?utm_term=package+disabler+apk+no+root PDF link annotation
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/328784a2f1b182e77703d731817feb42/bedezoluw.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160727faa96898---6639834263.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c534ade04---rofila.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160756891f28ab---27000061325.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/40243397248.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/3b436fb05838909859fd4ebe41a19aa6/vagozemokiroz.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/99agsavqi0tjhmak9t2e1po9qd/pidel.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895529ebca9---sujazodejewo.pdfIn PDF document text
    • https://burgaseguros.com/userfiles/file/wubawoxelodipenapakimod.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/11696642440.pdfIn PDF document text
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d58a2e0e18---fopolov.pdfIn PDF document text
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/naropododas.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/xaragil.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/72220279264.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b6054a340---xefasigedewabedis.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b06fbb8d2---88250662439.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/87425288923.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4162bb835---34676736048.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/jaror.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607167efc6f70---gudujatonujus.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c945bf2bbe---zasevasepanimekutubevugaz.pdfIn PDF document text
    • http://ilovechardonnayhills.com/userimages/75845801723.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb951356e8---gerexelu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E0 29296 bytes
SHA-256: 9cb4ad84b00345b98ded2797ee2a226f772775127e97da9c2e0560249574ba58
font_01_sfnt_off00012549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12549 10924 bytes
SHA-256: 97b471bcf02e1f4f6b0c3da862f280ff7f8a670375edb643a75c0dbe79a08666
font_02_sfnt_off00013e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E48 16244 bytes
SHA-256: c6eabc0e786f34e9bd46a20732e32404c3a2056509a6b0610068810470d9e2d5
font_03_sfnt_off0001544c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1544C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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