Malicious PDF — malware analysis report

Static analysis result for SHA-256 22975219623f6836…

MALICIOUS

PDF

95.3 KB Created: 2021-08-20 14:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9dedd7298f406c9cec7f34f4eec9c8ff SHA-1: 990171d53e81fd229b0eb42316a9ac19d421617c SHA-256: 22975219623f6836cc6a1b9a6c4b2ee3140d11a625bd9bb607abeb72ac041832
204 Risk Score

Malware Insights

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

This PDF document exhibits multiple indicators of malicious intent, including a high ML classification and ClamAV detection as a phishing trojan. The presence of a 'Browser extension / update installation lure' heuristic strongly suggests a social engineering tactic to trick the user into downloading a payload. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, further support this, likely serving as download locations for the malicious content. No scripts were extracted, but the overall pattern indicates a phishing attempt designed to deliver malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://archism.ru/uplcv?utm_term=download+apostle+joshua+selman+messages+on+prayer PDF link annotation
    • http://rolmech-strzelno.pl/Upload/file/gatopakuwavusik.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/fovawezaru.pdfIn PDF document text
    • https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/9dbf5705a1c7aa29e66876cb44c2b6f3/vanomojubavagaz.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/87c3c908218d05c6ec810cf2a3baa70a/54754138032.pdfIn PDF document text
    • http://automotiveenergy.cz/userfiles/file/bowivotubinosa.pdfIn PDF document text
    • http://kcde.kr/userfiles/file/negazumuwukezuxuf.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/fasipaduzovura.pdfIn PDF document text
    • https://mraos.com/web/userfiles/file/54765999920.pdfIn PDF document text
    • http://faizleathergloves.com/userfiles/files/digozadefawokuvikovamavug.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111188b04d13---juvuviravavad.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609d62b53f159---palulininafafotezi.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/rsg9nmr7rqpe7i7qt7q6l4nbe2/sijemizuni.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/pdm5badiebclmdmjld4e6ur2c2/doborabezepegowase.pdfIn PDF document text
    • https://sharadsangam.org/UserFilesTwo/file/29355777707.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160aed403e674a---35435375520.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/gudebubemogafujuwazo.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a551d8af592---nikaxeguvevutolaxuzulazal.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/pekiwazepawimiwiropetaz.pdfIn PDF document text
    • https://mm-podium.ro/userfiles/file/64586610765.pdfIn PDF document text
    • http://gsprojekt.eu/userfiles/files/pilabamedejirupo.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/423f5b0a281ba80951e334cac8bc4b6b/jifixapix.pdfIn PDF document text
    • http://ashioke.com/images/library/File/nasimejifilajupotilor.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073697b7a7c9---33900256479.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E09 17792 bytes
SHA-256: b2adc4dd0cafcb93457efd80c02dc3f43f4b34429faade3c19648f0384faf7f8
font_01_sfnt_off00013cce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CCE 11180 bytes
SHA-256: a41ead696827e1dc100b0b124fcaec029bd4768474909680c54b5923dfa05888
font_02_sfnt_off000156ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156AC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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