Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce3439dcccf1e7a2…

MALICIOUS

PDF

95.5 KB Created: 2021-06-26 07:34:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 087035aa5df44d0b60d86bc8a16eb373 SHA-1: 2f7c00d700bac19908ad2b550a90ae218137d53c SHA-256: ce3439dcccf1e7a2657c925bb183f5f7b080d936405a0da1f10ae6d9680055a0
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a link farm with numerous external URLs, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution scheme. The presence of a 'download button' lure further supports this, aiming to trick users into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://philabc.ru/uplcv?utm_term=how+to+play+summoners+war+on+pc PDF link annotation
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1a240e43e---73715784921.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/35120552410.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5439534a76---fudukatijezozisasitirili.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/6d50cdadfed9c2a09fa5852494696b88/derefig.pdfIn PDF document text
    • https://mdteam.se/ckfinder/userfiles/files/90579354860.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/figudobokazokadodinonesaw.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4d16bf71f---webavafijipis.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb1264c71d---felubale.pdfIn PDF document text
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/farasosut.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/a48ea7b843dab3bc8f6192866eedf8b9/66120922903.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beea9836545---25331062860.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609417af1c865---xarezaronowej.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/85711812186.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea74488e03---nudujowa.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1607150aa9a483---57759005839.pdfIn PDF document text
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/a5046f6d50bdfa72e9227db39c62c144/15975203666.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/21cb3cbec5fa5166492a853e1ef1ce77/13124011199.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/lmptas1l1g64g1janksp3dsp5e/83794287679.pdfIn PDF document text
    • http://crediramasrl.it/public/file/juforigajewo.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/favuselozoramomug.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a89f107bdc5---renatevexutebevezi.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/54f1a66d0adb26e765143b997fa5b90b/kamutotetiganu.pdfIn PDF document text
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e80d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE80D 10732 bytes
SHA-256: 64705ff707bb5f5f976e547e5c0e103b989bdcf3ffe0d7aad09286ad3a0089b3
font_01_sfnt_off000100d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D2 16816 bytes
SHA-256: 7f8e1cb1d5d9cd19cc3c839743be1225e966cf4f9f06ca11f531404b0bea3a0d
font_02_sfnt_off000118ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000130ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130FF 20204 bytes
SHA-256: fc36c191eea1e2b4a48fd4744032d024a4895be718f1c01ddd6c308c1fb74954
font_04_sfnt_off00016284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16284 3464 bytes
SHA-256: ab430045ba5a94791c45c8c87ebaca6374d039af1ea5371a2a4deb0d3ff8d9be

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