Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc58ed8c4f9399e…

MALICIOUS

PDF

87.9 KB Created: 2021-07-25 08:01:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 42edeb558ce349af1609aad4d2592010 SHA-1: fbc3ec3637ca6577ae90b0f895b00abd808b1540 SHA-256: 2fc58ed8c4f9399ee4597cb2c4bfb6e8be71eb8cade788d08fa11dc642a42b65
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document was flagged by ML classifiers and ClamAV as malicious, indicating it is likely a phishing or malware distribution lure. It contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS platforms or disposable hosting. The presence of 'cmdh0mjo3avvqd/73629036458.pdf' in the document text suggests an attempt to execute commands or disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9795

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jxloanchien.com/style/postimage/file/7278969549.pdf In PDF document text
    • http://ahkkpcm.org/userfiles/92926753989.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/74a9984d5d099d26c00a3af38aa813c1/72119203095.pdfIn PDF document text
    • http://www.moyekolodin.com/files/79034831319.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8bebe5b85---wugosijejatig.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/bfb854fc65e6efe9b076ccbef10a44cb/66963149441.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/34269936114.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/d641cc6c0bfe542d9da1423ad4c97141/tisoveketeg.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/55703386102.pdfIn PDF document text
    • http://enjoyisagenix.com/ckfinder/userfiles/files/94624510712.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dabcdd3368---nirijug.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/fejevemosewadufod.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/zatawadanubujav.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a44f42d479---98003887586.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ov4b9166ovt4cmdh0mjo3avvqd/73629036458.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c541ea9cbb0---20896349782.pdfIn PDF document text
    • https://aymfly.com/aym_image/files/jefosovimigisibikidap.pdfIn macro / runtime command snippet
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/4g42sv38ief431r3lgqop32835/gutedojuvijow.pdfIn PDF document text
    • https://lentes123.com/aym_image/files/45647087393.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160925882c8b87---44703455485.pdfIn PDF document text
    • http://pp-aqua.com/userfiles/files/58048467492.pdfIn PDF document text
    • http://habitat3.eu/userfiles/files/24781333885.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/noninod.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/tikunun.pdfIn PDF document text
    • http://isgsrl.it/images/file/tokotupok.pdfIn PDF document text
    • https://itexpertdog.com/upload/files/74427778912.pdfIn PDF document text
    • https://fastcomputer.vn/wp-content/plugins/super-forms/uploads/php/files/62ff587827f56b42a80fcd727ca4e720/voxopimurupup.pdfIn PDF document text
    • https://www.areatransfers.comIn macro / runtime command snippet
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=les+adjectifs+possessifs+tableau+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F9 18700 bytes
SHA-256: 4b04dc524385dc6e43b527faad21f531ec37f93c5eef85de0fc23fab2833e822
font_01_sfnt_off0001170b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F22 10736 bytes
SHA-256: ce0d79f63e0a88d7b5bdd196d75e081051f33e7a13c2c684e594d60adf0ae19d
font_03_sfnt_off000147a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147A4 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500

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