Malicious PDF — malware analysis report

Static analysis result for SHA-256 472bec73ce9a2b86…

MALICIOUS

PDF

87.7 KB Created: 2021-07-06 22:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c6725d8f5a8d925ec5a9589ca730ed64 SHA-1: 07d1717b4bed3d6bb844441acdb2ad76036f32f9 SHA-256: 472bec73ce9a2b86ceb1e182b4cdbd71dc94b5db8dbfeccd0d4504bb09f3c811
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. The heuristic firings indicate a link farm designed to direct users to potentially malicious content, consistent with phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/2a59b2cbffac0d9fa44266b7d593f26a/58899933584.pdf
    • http://hocikto.info/userfiles/file/nemuwusuferumopodogifuje.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/95370aac9c1f2bc78751b76b593f29ce/rewipi.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bb32129b2ff---wofezivojaz.pdf
    • http://franklinbristerharveyfamily.com/clients/a/a8/a8910385c57dfddac3c6311e2bd1422e/File/patameligib.pdf
    • http://rogo-rotterdam.nl/files/78207684745.pdf
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/fdmef9tbc7it7tju9gf3051epc/lotixarizedovap.pdf
    • http://begemot-rus.com/uploadfiles/file/2021070600190773499.pdf
    • http://leadershipcareer.kr/fckeditor/_upload/file/tapuranonolegamekubake.pdf
    • https://imad0c0.com/js/ckfinder/userfiles/files/36708421257.pdf
    • http://files.ibiza-ferien.de/file/2340907268.pdf
    • https://inverpalmas.com/aym_image/files/67938435131.pdf
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbe8a55b6e---vemuvewarevadimafib.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ade83e1e67d---potasipadefidurenogarubi.pdf
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbf9722b79---xawesanipaxivak.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ae67a15da2d---tususuwuf.pdf
    • http://fatamorgana.fr/uploads/assets/file/jezopogiwemosuw.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/0fbkd6i509tldt789pkksrte2q/xowotiwozo.pdf
    • https://paron-rebondir.com/uploads/files/faxuketukawasomevubujute.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad4cd595a6---fefuzaletemere.pdf
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d9c6293262a---40487403394.pdf
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/21h8lqu03m2tijlfqi5tkmee81/7810213129.pdf
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ce76f39bc2---saxovedezulo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=stiff+ankles+morning+after+running
    • 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_off0000f528.bin
f6bc56abef0c949df02b093d1f02c838e92ff57848bad53977c5f8fbcd41b790
pdf-font-stream PDF embedded font (sfnt) at offset 0xF528 16764 bytes
font_01_sfnt_off0001207a.bin
334d1102ee5ca2963d92a43bb5b00656d3f7820222e354831be211faeb64de8f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1207A 10824 bytes
font_02_sfnt_off00013969.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13969 16792 bytes