Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c58f6c504f958c7…

MALICIOUS

PDF

94.4 KB Created: 2021-08-24 18:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bfe9f2fdba75077b6eac00cbd1f20d68 SHA-1: b01b8018d8101444dbd6024297749fdf2f2f73c2 SHA-256: 7c58f6c504f958c7f178e67a45c4ae53846f116a3bdd42a35f3b5a0e058955df
156 Risk Score

Malware Insights

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

The file was identified as malicious by a ML classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to PDF files hosted on compromised websites, suggesting a phishing or malware distribution campaign. The presence of multiple links to compromised CMS upload storage further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

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://bnovum.hu/downloads/moxaxusun.pdf In PDF document text
    • http://arebiatours.com/uploads/files/bakenemef.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/kjrch0acn4nuss04juqfab09r0/jufidiwipesajafefovilan.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/07f2113c1514cdf91fc7fe737f448873/7940862098.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/89043684951.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/3e11ab357d4208642d0dafdb6e1e666f/35257292468.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d29c77b4ae---girovopubuvesugasanav.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c9999adde5b---57865137144.pdfIn PDF document text
    • http://lsphc.com/userfiles/file///46592625064.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/46549701506.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/2c1e562bd1ee69747db37ad9ced2c2d1/pagivube.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/vigegozazix.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/pegugatepeka.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/66536233827.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/il7pnco1e9fadk3qlfp5delmth/62440550266.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/50695427247.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/tj195st9htjn8no4alu3ul9ko6/siwebupiwo.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608f698687935---sivexaruruzupimasezu.pdfIn PDF document text
    • http://grodgolf.com/clients/f/fd/fd83fa7079552abb47853a85229f74c1/File/puwarinisefose.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/13126292764.pdfIn PDF document text
    • https://davidfoleyinc.com/userfiles/file/vetofonu.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/wigixoxug.pdfIn PDF document text
    • http://wsm.hk/images/files/10563728566.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160e23a1b67f22---38969240032.pdfIn PDF document text
    • https://medtek.vn/storage/file/buvosukasavuminemaketeru.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/gumorurute.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c970885237a---486437868.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/ilqf8rcbver7hcbi97igjqa9gq/ranexubifi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=perbedaan+past+continuous+dan+past+perfect+continuousPDF link annotation
    • 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_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 10808 bytes
SHA-256: 4e8cd8623ba8dd765e238d09d380e143b342bb8613731568c05613277bc5f45d
font_01_sfnt_off00012630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013e42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E42 16456 bytes
SHA-256: 170ae4987d760ec647d27c6dc77417e66463d3941b6529880584c21c020d3df6

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