Malicious PDF — malware analysis report

Static analysis result for SHA-256 292ad4881cee235a…

MALICIOUS

PDF

107.6 KB Created: 2021-09-12 12:04:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: afd4b21c6f900cab8a833963f9776597 SHA-1: a920a9dbe16977a9b1aa4ae11f905bf10d768ce0 SHA-256: 292ad4881cee235ac24d4105f71a26be77ab3cdb38a246b50dce72c107308fd9
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs further supports its role as a lure or distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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.impactit.in/ckfinder/userfiles/files/ledokojezokanawuzisegot.pdf
    • http://innovatepc.com/userfiles/file/fibed.pdf
    • http://iwort.de/userfiles/file/74123374048.pdf
    • https://bahispesinde.com/gnc/veri/_files/10701248482.pdf
    • http://www.afurg.com.br/assets/ckfinder/userfiles/files/desezabojidefefelo.pdf
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613589de947ea---94536699511.pdf
    • https://pima-alarms.eu/slicice/file/borudodotijijusojusax.pdf
    • http://sial.pl/galeria/file/kopaso.pdf
    • http://st-johnson.com/Uploadfiles/files/tolojunobu.pdf
    • http://sjar-tech.com/uploadfile/file///2021090407101858.pdf
    • http://innotec-industrie.be/userfiles/file/bureferukimubil.pdf
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1db103679---4522655118.pdf
    • https://kimtuong.vn/isc/public/files/fckupload/file/57705973405.pdf
    • http://paramountswimwear.com/userfiles/files/zulediviwux.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/161327c7e7ec75---vazojenogoxasomo.pdf
    • https://karolinanowak.com/userfiles/file/setenem.pdf
    • http://esteel.my/userfiles/file/41663898660.pdf
    • http://greathorserider.com/ckfinder/userfiles/files/bozuruliral.pdf
    • http://dalieuht.com/app/webroot/uploads/files/22665058577.pdf
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/34fd64aa4241465d6af03cc6f64bda6d/59012075811.pdf
    • http://studiovalentini.eu/userfiles/files/23330950465.pdf
    • http://jfhcoaching.com/userfiles/files/44098060923.pdf
    • http://swotaweb.com/img/upload/file/60261471283.pdf
    • https://muguet.fr/sites/default/files/file/70265409588.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6b82a9036---57779918034.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=pokemon+emerald+ralts+cheat
    • 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_off00014078.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14078 16792 bytes
font_01_sfnt_off0001588f.bin
52ac4e6855580004a8140bd978246e4fc6738b267a7be970991d75179a60d062
pdf-font-stream PDF embedded font (sfnt) at offset 0x1588F 10636 bytes
font_02_sfnt_off000170bd.bin
29c95f0e59bd96666fd7202c89fa386a36b659d03d08e5bb16173763a239e8ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x170BD 18684 bytes