Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ac395a8b8883318…

MALICIOUS

PDF

67.7 KB Created: 2021-09-28 06:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bdbc5456349299c90361f7c107558abf SHA-1: f547a710f16c50c2955738a21f0ead041329b7c6 SHA-256: 0ac395a8b8883318d000611169a9ccf8e293747c7a19c9a831ec9a937fb969dc
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a phishing or redirection scheme. The 'Image-only document with action trigger' heuristic indicates a common lure technique where a visual element hides a clickable link. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://huntic.ru/uplcv?utm_term=wild+pokemon+modifier+pokemon+platinum
    • https://laplacedesstores.com/upload/file/ginuvakejaxabiguwip.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a463822c5---24471887108.pdf
    • http://cke.hk/userfiles/kevaxabefew.pdf
    • http://romangruszecki.com/uploaded/file/94227981629.pdf
    • http://thuocamakong.net/userfiles/image/file/xogufipapipifiv.pdf
    • https://hk-delight.com/UploadFiles/file/41928987473.pdf
    • https://inmaabiladi.com/userfiles/files/34334254975.pdf
    • http://ghettaetamionarchitetti.it/userfiles/files/13412387821.pdf
    • https://economiadecomunion.com/ckfinder/userfiles/files/74522543473.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614236368887e---kadibexowovafiruvugo.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161315ece00fb4---77675037594.pdf
    • http://888spirits.com/userfiles/file/bikit.pdf
    • http://lpxs168.com/filespath/files/20210912073841.pdf
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/e5ace83d51e4d5a6b1f55ecda579e2b5/508988442.pdf
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/wibovajizabusatekuwosat.pdf
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/zarujemikuloletumemokop.pdf
    • https://olympicwroclaw.pl/zdjecia/fck/file/8916606435.pdf
    • https://www.sensormaticltd.com/app/templates/js/ckfinder/userfiles/files/93643405236.pdf
    • http://bjaimama.com/data/upload/2021/09/file/202109190438309649.pdf
    • http://akiisushi.com/uploads/files/20259331385.pdf
    • https://mcsfood.com/images/file/69013145797.pdf
    • http://registermycompany.in/admin/userfiles/file/11753673141.pdf
    • 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_off0000ada6.bin
3419649843ccaa37a28aa2695f8f76cc99a7e96712e4cff3d7c81c8c367c8265
pdf-font-stream PDF embedded font (sfnt) at offset 0xADA6 14096 bytes
font_01_sfnt_off0000d0b3.bin
e9ff5c1c4d6170504b1bfe671433c29c8d4567db2737027564d3ed6c043f161f
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B3 10676 bytes
font_02_sfnt_off0000e91b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE91B 16792 bytes