Malicious PDF — malware analysis report

Static analysis result for SHA-256 e74d10c962805ddd…

MALICIOUS

PDF

89.4 KB Created: 2021-08-21 02:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 747d5733f99029211852fac5dfb36873 SHA-1: 8ef0ae1baa1b01e706fdae3589351587dea8d914 SHA-256: e74d10c962805dddef23dbe7c7db942ca6e8563c37b6f2d37847387141c3f8d4
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains numerous links to compromised websites, suggesting it is part of a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure. Although no scripts were explicitly extracted, the overall structure and URL patterns are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://oniceh.ru/uplcv?utm_term=thevaram+lyrics+in+tamil+with+meaning+pdf PDF link annotation
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/f044fe84d2f77781b935a341236a74e2/bolekajofamunalefugiz.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ed9ab5f704---tilejovuvelepinaxolabav.pdfIn PDF document text
    • https://paardenwelzijnscheck.nl/app/webroot/files/ckeditor_files/files/60781542615.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/b239ddbde8ec342042f9454f2bb4ec66/pufepimeliwevomivixo.pdfIn PDF document text
    • http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/ffa14551a9cc81ab4dd1bdce20727d93/27024020242.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7d2b936ed---55135820015.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/41368573840.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/penavolabirewixonokefoni.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/4ec7005d0cb9b894b6c0622f3d2403cf/58208473505.pdfIn PDF document text
    • https://medtek.vn/storage/file/41663375862.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/21195496136.pdfIn PDF document text
    • https://cdpu.net/wp-content/plugins/super-forms/uploads/php/files/d600629fe25f7b8de1f276027b10a5dd/titenojov.pdfIn PDF document text
    • https://verticala.ro/images/userfiles/45397243420.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3c50eb2fb---kalopa.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/xoligodosadazadegufefopuv.pdfIn PDF document text
    • http://susutour.com/userfile/file/mibezemoj.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/46333921277.pdfIn PDF document text
    • https://ottopianos.nl/files/zawobogubegisup.pdfIn PDF document text
    • http://seamcc.com/UserFiles/files/wemagivexe.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbbe0ce4a1---zobujutesapexutox.pdfIn PDF document text
    • http://breakevenpoint.pl/uploads/editor/file/28161854887.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/44151988164.pdfIn PDF document text
    • https://samsungvrvklima.com/upload/ckfinder/files/dusemidano.pdfIn PDF document text
    • https://ottenburger.com/userfiles/file/zarumufikumobarezujakewa.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/12c04ae10388bb67ad9e41acf1d6443b/xiwovukiwiju.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/43245055426.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF476 18504 bytes
SHA-256: 20ffe6ca5eabb07d54d92d324d87b62a726129b6e2ab3ed2f19467d751fd5bc8
font_01_sfnt_off000124af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013cc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC6 11176 bytes
SHA-256: d488805430eb7dccbd19ce6a71f186661b7a20456b0affc6dc9962c36eb4b48c

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