Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea14499874f90087…

MALICIOUS

PDF

87.1 KB Created: 2021-06-17 21:45:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 64ccf97f74c604c55004160b83cdd518 SHA-1: 056a6d6afe8822e31073b1edd92dc681e697689c SHA-256: ea14499874f9008741987da10ecf5394967f0b423e534926896332c6f6ff9326
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external resources, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://acgroupenterprise.com/userfiles/file/wizakibusujepigazuxiraj.pdf In PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a110ac876db---runaruraxofol.pdfIn PDF document text
    • http://laweasy.kr/userfiles/file/norujikunopavakogebosa.pdfIn PDF document text
    • https://www.reflectionuk.com/wp-content/plugins/super-forms/uploads/php/files/dd0kcoirot3h6jrpl803jvjfuh/fapimiwisegodilolon.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/4s2unoaeisn6lfa12iku7bmqlb/xunekufejazet.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/547b9c0939f84f0f3de99968225fe98b/17523159076.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c10279e7d1a---sigofuloxo.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/81164448026.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/11396412510.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/puvozife.pdfIn PDF document text
    • http://carnavaldemarbella.com/Senegal_5/Content/files/userfiles/file/22297881461.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/78a72bf304ea5eca08ad3773645fa846/dowenowulewis.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5f131b4a3964265f219c2340048fdb78/33292794178.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/57444944313.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efe76c7970---41569833390.pdfIn PDF document text
    • http://syuncyoku.jp/upload/file/banadito.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/fb9999ac0c7c7fd64da7c1ecd3566bc8/93459520835.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=drishyam+movie+with+english+subtitlesPDF 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://scripts.sil.org/OFLIn 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_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 5492 bytes
SHA-256: c868640d49680cdc2b35ce839b44c9f54856d59f59653fa92435024d1fbb3340
font_01_sfnt_off00010578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10578 2092 bytes
SHA-256: 78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
font_02_sfnt_off00010f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1D 11400 bytes
SHA-256: 05a0da3a1cd58a79e7d2c085c0085bf83d5d1d6ab289c22e8e42fa1ac3fb574c
font_03_sfnt_off00013643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13643 16356 bytes
SHA-256: af73db34d2253a60034eddfec560457eabad9a460607ea74e9691cb568e4e439

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