Malicious PDF — malware analysis report

Static analysis result for SHA-256 e367bb02d083bec2…

MALICIOUS

PDF

71.0 KB Created: 2021-09-20 22:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0fc3c49da18505ab287d9833e6b6d798 SHA-1: 8596859ec257be1c9821fefe11db60867bd1f258 SHA-256: e367bb02d083bec2de086c198bbd48b934c61e7cc3efcce0b94d95aa61417ca8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code or redirecting users. The presence of multiple links pointing to potentially compromised or disposable hosting, combined with a high ML classifier score and ClamAV detection, strongly suggests malicious intent. The embedded JavaScript likely serves to initiate a download or redirect to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hawaiisushi.iorderfoods.com/uploads/files/vekilubaje.pdf In PDF document text
    • https://pgp-puh.hr/fck_media/file/75720505138.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/83006784695.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/86323144627.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/dewobolome.pdfIn PDF document text
    • https://imahima.xyz/js/ckfinder/userfiles/files/texojewaripesuwusozugite.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/mogukuzuvigipidazufuwuz.pdfIn PDF document text
    • https://illinoisfiscalpolicycouncil.org/app/webroot/userfiles/file/sojowerixitazujenireniv.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/37861756053.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/ed8a33198965c04c60567dec434bff7e/xogijawagefu.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/24263424896.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/kufosekabuwodujojapoporeb.pdfIn PDF document text
    • http://tion.hu/upload/file/73451104393.pdfIn PDF document text
    • https://ceylinpin.com/calisma2/files/uploads/gumojesutatiziko.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/27053966098.pdfIn PDF document text
    • http://studiochiodo.eu/userfiles/files/sajizuvikewe.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/84067504089.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/8b3190f0fd5d062ae524024aeab91d3f/70493619934.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/de457dd09385cc2b8f9e877689e4fea9/vexabajimilosasuj.pdfIn PDF document text
    • http://vcelari.naceradec.cz/includes/ckfinder/userfiles/files/42463463465.pdfIn PDF document text
    • http://sungwoo-n.com/userfiles/file/19323317416.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16142bfd8b6f89---44214361130.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/87cdfced3c5df119adf6ede1f148c0b8/xikavisukojovixaxakuseto.pdfIn PDF document text
    • http://ausafe.net/images/art/files/10557783268.pdfIn PDF document text
    • http://xn----7sbjvweekof5d.xn--p1ai/files/files/zalukomufujageli.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/15164794763.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=dragon+ball+legends+androidPDF link annotation
    • 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_off0000b66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB66A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ce81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE81 10468 bytes
SHA-256: a8131414ace3c78e8fcd5f130ed04e0f4c57329fdde776950f63c91711a0cf42
font_02_sfnt_off0000e612.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE612 15740 bytes
SHA-256: 69cbccad08cff8612b4d97db59bcfb09705c880b8c8ecef6481487474cdc71f4