Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e476d9f1154c1f…

MALICIOUS

PDF

83.4 KB Created: 2021-08-10 23:18:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddccfbe1caece980babed849bbf41eb0 SHA-1: 34b2ddb011fcd88cdcf2e83860eab233745c0d9c SHA-256: b9e476d9f1154c1f14b9e5051c7000861f82f818072b4071334a39f89b712feb
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to lure victims to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/jilawulalasim.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/8d9120d8911507c5677565c3779a5fa5/posevegisozowoduviteri.pdf
    • http://auroraenergyproject.it/userfiles/files/67085176487.pdf
    • http://obasekiestates.com/UserFiles/file/golaraxefipez.pdf
    • http://baloneacessorios.com/_upload/file///20524167764.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae54c7e552---rusigomotavevuzomejowovat.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/2f66643ba9e1f583f8e4da39ad7cd069/30236215356.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcb3d7fd16---fimizasadenofofalove.pdf
    • http://cageart.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160f14359198e4---voxeba.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a691f7a896c---jazugula.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae7f7776dd0---93987008334.pdf
    • http://verynailscm.com/user_img/file/33254588063.pdf
    • https://socohoteldanang.com/uploads/image/files/20355339073.pdf
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/8cc3970b6988f5fab994d09e6214a6c9/mowozopopa.pdf
    • http://berbun.com/user_img/file/lopixajelabojibij.pdf
    • https://medsplus.us/admin/images/file/26547827868.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73b53c791b---fozomajojifilegixel.pdf
    • https://wrd13.com/force/file/tujodow.pdf
    • http://brukbet.com/user_images/file/18923792733.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/25b6ecd83bd4b838987340709cd34a4e/6800383766.pdf
    • http://dothanhigh1970.com/clients/6/63/63ba8bdc6fdca46b25bb56d5732eafc9/File/78531938359.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e76c821ed96---beruduzerutimenedike.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=spider-man+far+from+home+full+movie+watch+online+free+in+tamil
    • 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_off0000df30.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF30 16792 bytes
font_01_sfnt_off0000f742.bin
30a10ab9725d24c70b98874451be5889860d4fc4d7792df85ffa3b274eca6ad3
pdf-font-stream PDF embedded font (sfnt) at offset 0xF742 17384 bytes
font_02_sfnt_off000124ee.bin
e0d54aec0c1393dfe32eb9dbb0b494bd0106a702eaee315dc668c128e2b542b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x124EE 11076 bytes