Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c9853a7c0b0781…

MALICIOUS

PDF

118.8 KB Created: 2021-07-15 11:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f720cd1f9646d87b2819ad47e2ed9118 SHA-1: 5e835b23e83461428a44c7f3b92070c418132ba9 SHA-256: 11c9853a7c0b07817cc0d3f7f7a71d0f13355b8e136084dc1b7e0ad19f560b84
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://www.annaleehuber.com/content_files/file/vukapupidawidero.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/bdcdb9f6fe678b344227c67de808029f/75230085230.pdf
    • http://hesexpo.com/img/editor/image/file/lubukajidikosek.pdf
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb670e46583---juwimovukizonap.pdf
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/16705823012.pdf
    • http://conblocmanado.com/pics/file/kixidosuxedojikudax.pdf
    • http://tortsurprise.ru/upload/redactor/files/xuxivizemidoleru.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc6d69c348---14563013891.pdf
    • http://schooldistrictservices.com/clients/f/f6/f6ab1571d2cdf5e569af7b76e288b17c/File/viroseg.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/01815bcc6088fde5ee46be24733b014a/doxeduwagutugojuvavuvi.pdf
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/c3c71905a164ad59ca41e047e1fbbf68/tebivefezomasi.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089321f99fbf---puvoresonegijefogigo.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba690492937---mugemoduxotebevosugip.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a68df92e38---21329277235.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c81c162b24---73708693467.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/4ba9b307dc65ab00319b69cce6a36e79/17981481329.pdf
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072dfaee4eff---ximifixozawobuvesoki.pdf
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160741acfdf629---lutaromibugajogawiga.pdf
    • http://hiddenforrest.net/clients/76790/File/36400273914.pdf
    • http://angelofthewinds.net/ckfinder/userfiles/files/govipadoramiwimifotewida.pdf
    • http://soldresold.com/Shradhdha-Mehra/soldresold/final/ckeditorimage/files/60523026207.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/6e170f0be440b2fe05b9c854576c7fc6/18209459347.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b6e60eee605---33655259472.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab9f9cbab2b---togexe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=losing+hope+of+finding+someone
    • 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_off00016c61.bin
9073060ad857c49b4dcfe3b6b45f5d4757817d68fe43694d81ef750218e9ff5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C61 19844 bytes
font_01_sfnt_off00019ea5.bin
c373a78a00556d5d1afc87001ed84b861036e8146942770c713858dbbe480863		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19EA5 10496 bytes
font_02_sfnt_off0001b606.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B606 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.