Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee42944a5170ca5c…

MALICIOUS

PDF

82.0 KB Created: 2021-09-04 06:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: be6076841b5ab9c2e9fda1a2c78d7004 SHA-1: 7fbc87cfe8f643d8a0b0429031b4bf5ddb71bd07 SHA-256: ee42944a5170ca5cee0fca639d841988cb8c7b31f777d05dc94fb3185b50718c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 https://medvor.ru/uplcv?utm_term=wr-ipx7+apple+watch+manual PDF link annotation
    • http://karate-talence.com/newsite/userfiles/files/72444583083.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/7ddc87ae2f2db02e4b011e9d44c8879a/65429755346.pdfIn PDF document text
    • https://brahmagnanam.org/fck_uploads/file/20043345604.pdfIn PDF document text
    • http://tabouligrill.com/ckfinder/userfiles/files/kukurediraxo.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/tilafuraxawegadopakaneto.pdfIn PDF document text
    • https://securitydm.eu/slicice/file/nebojopa.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec96a304d3b---15291426109.pdfIn PDF document text
    • http://energo-winstal.pl/userfiles/file/87485883995.pdfIn PDF document text
    • https://businesslife.com/content/file/nabivukebafiveber.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/6864c0bb0dafb8100d98c8d70c7c5d51/59957555888.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/154d4a2ab0cad8627f4419629f43bd5e/xexosebafanubudexe.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/192e2d945533de5716551cb46bb9dd2d/54987720440.pdfIn PDF document text
    • http://sportsgarten.com/editorData/file/30450620420.pdfIn PDF document text
    • http://krzysztofmalec.pl/gfx/fck/file/zunipubezadiberijakaxuf.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/8ad24110a533c2613cff2e24e70de3f7/77454772720.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/rixorovilasefofofadupa.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/5e7ac0372a2a40aa14d159fc3b2d8dd7/71218906015.pdfIn PDF document text
    • http://tivatijapan.com/uploads/userfiles/file/woxaxuxoxigaxukoxajufutew.pdfIn PDF document text
    • http://phongthuyphatloc.com/luutru/files/67784063529.pdfIn PDF document text
    • https://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/37171294295.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf09499e387---xezosebaderawatixizax.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/nh9e7jiirh5a34ki2qkbq3m846/susev.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e238947fc---6395329461.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_off0000da57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA57 10716 bytes
SHA-256: 0854a7827e77610b0f26f5ebecb054124bd23f3226107a31aaf99cede09bf5ff
font_01_sfnt_off0000f2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D8 18372 bytes
SHA-256: f16e42239a01e22c5a2ecee2df72cf7520b532cb8063765b1e270a078a94c4c0
font_02_sfnt_off00012249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12249 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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