Malicious PDF — malware analysis report

Static analysis result for SHA-256 d628dfb1e04597a0…

MALICIOUS

PDF

93.5 KB Created: 2021-06-29 09:52:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7f70a7d0f8b57299108313e0fc6b6ea8 SHA-1: bc5f41678f3df40bf8d79619929b23e52f555f70 SHA-256: d628dfb1e04597a0b2ebeb6fcd8f86ca3bee980e8576702eb931c3f18b767d82
156 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 file functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised CMS platforms. This suggests an attempt to lure users to potentially malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=roguelike+adventures+and+dungeons+minecraft+texture+pack PDF link annotation
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/b741581570089a4588f5b8dbc3434e63/42306878854.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9ec3f06f4---82421921111.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/gt6779jnlaj9o1qbbm8eef74q9/newibepumekirox.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/97a50c6e55c1ae218cca87258538842b/23154785478.pdfIn PDF document text
    • http://cleangroupbd.com/ck/upload/files/potijemadodilulimewuj.pdfIn PDF document text
    • http://copy2d.com/ftp/image/file/mawikebugatukaro.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/sedajuxowivosex.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609b07591681b---lolubumevet.pdfIn PDF document text
    • http://traiteur-ribot.fr/userfiles/file/desokuvisewatojemawad.pdfIn PDF document text
    • https://bank-kredit.at/ckfinder/userfiles/files/81079614303.pdfIn PDF document text
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/071607513.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/e82812af0bdfe9cb8b01b2f17c9a761d/73689038024.pdfIn PDF document text
    • http://alnoorcity.com/userfiles/file/17020548215.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/c270b5fe17eb992044183b9a4350b6d9/zuvapu.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/1fcc1a71c716f2b90b9b3c3d7cc1fd36/bebobexon.pdfIn PDF document text
    • http://anbao.vn/uploads/userfiles/file/suwudelobibimokipipuja.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089381c40c49---bexaposatibib.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f6011cf750c0bdbfb91defdeed354e55/tukaxedow.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f8400eb7f---xemusekabuwidowekox.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/qgt2erjn5jlo3m2ekqgklphs47/bewuwurupofosapezoj.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/pasizetewamerevobepa.pdfIn PDF document text
    • http://rentbucharest.net/images/userfiles/4726752607.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/29650715629.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10608 19028 bytes
SHA-256: 11308014f16c788aa72e83328b85be01f776774d8bc32da234c56472793a90c3
font_02_sfnt_off0001361f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1361F 11368 bytes
SHA-256: 68c8d642b71d4e57276631ca2d2032d33969087c611583537e68c38ceda47214
font_03_sfnt_off000150c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C4 16064 bytes
SHA-256: a013ce2342554bbd70a9f85285a6053b67e9b25eaba0dd22223cc179b1b1ea16

Open this report in the interactive analyzer, or submit your own file for analysis.