Malicious PDF — malware analysis report

Static analysis result for SHA-256 9283d45246e91794…

MALICIOUS

PDF

80.7 KB Created: 2021-09-19 09:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ef17ae0158961cc14e326061604f5b6 SHA-1: 5088c36524e1b34d292235c468adc26de19df57f SHA-256: 9283d45246e91794499d4dc7cc8f6fae8600379f45029e977d09894ef248c601
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with many embedded URLs pointing to various websites, including those hosted on compromised CMS platforms. The presence of multiple links and the use of disposable hosting suggest an attempt to distribute malicious content or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://a-pluset.com/userfiles/50639150664.pdf
    • http://www.sun-green.eu/ckfinder/userfiles/files/67372433009.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c9520120db3041ee87d93012ab35f912/33694060573.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161459bdb0ef53---17107290823.pdf
    • https://vroa.pl/chplusfiles/file/zetuv.pdf
    • https://sunkamalzemecilik.com/userfiles/file/42080243612.pdf
    • http://miwon.com.vn/app/webroot/uploads/files/81836621700.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/3230fca3eb85cd2dd7963c73720294d4/vegadusudunonanidaxi.pdf
    • http://palazzodiaz.com/userfiles/files/871087840.pdf
    • https://myagenda.myagenda.cz/pictures/editor/files/76866094571.pdf
    • http://wu-pao.com/upfiles/editor/files/virurusaxagepe.pdf
    • http://ibshop.gr/uploads/_uploads/files/mexoxezulipo.pdf
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/7492427897.pdf
    • https://unique-u.biz/images/uploads/file/6839933264.pdf
    • https://nezamirekhaseafoods.com/userfiles/file/81641661060.pdf
    • http://w-w.cn/isee/pfm/cms/uploadfile/fck/file/sudixaweteki.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eabc87fd659ce15044c9bfe775f5996d/vesivevebi.pdf
    • https://onlineadda.organicemall.com/ckfinder/userfiles/files/pawaziwasigenabojomot.pdf
    • https://bursakaynak.com/userfiles/file/88117942274.pdf
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614138bd837d7---wizonuvibilaki.pdf
    • https://dulsuc.cl/userfiles/file/21389519223.pdf
    • http://baovecongtruong.com/upload/files/funexotubo.pdf
    • https://villamishkan.com/310renonew/front/images/files/68552847323.pdf
    • http://ajarnveerapong.com/UserFiles/file/18496522813.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=what+is+it+good+for+absolutely+nothing+lyrics
    • 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_off0000d67c.bin
7abf9d305f0b42bdb2faec4de6269b48db9f8f73ede1647657f88fcc8b00d0ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xD67C 11104 bytes
font_01_sfnt_off0000f023.bin
e3feaba72e0a2f0e553a4c9a52b48a3b6af12c9952e03ce2b4a2acf69a246ecc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF023 17356 bytes
font_02_sfnt_off00011cf6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CF6 16792 bytes