Malicious PDF — malware analysis report

Static analysis result for SHA-256 6495f595da8cfdba…

MALICIOUS

PDF

82.6 KB Created: 2021-09-16 11:22:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 2becc12ff96708f5edbc9f0005190e01 SHA-1: 51741641065c8a540932ee86eeb290b47f91a748 SHA-256: 6495f595da8cfdba3713ee81039cc997b8a656a86a8ab6afd2cc34239fde0d4a
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, identified by heuristics like PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the nature of the links suggests a lure to download a malicious application or visit a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://ghalemdi.com/userfiles/file/18253937647.pdf In PDF document text
    • http://frickcontrols.com/uploads/files/gufede.pdfIn PDF document text
    • http://colantuono.it/userfiles/files/lomojukibumadewu.pdfIn PDF document text
    • http://tongrentangthai.com/UserFiles/file/wevogodev.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/nafizaput.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/zuzobifexag.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/galelewofepalokofipesiwi.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/10159767575.pdfIn PDF document text
    • https://nulifeus.com/~nulife/userfiles/file/92224406338.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e001879729---luwuxije.pdfIn PDF document text
    • http://zit-tech.com/userfiles/files/nuverukoxemigotozinigexix.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/5051518065.pdfIn PDF document text
    • http://westfallassociates.com/documents/file/46837431005.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/jemosokamexujifizewu.pdfIn PDF document text
    • http://druckmaschinenservice.com/uploads/fce/files/37851413233.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210904_142318.pdfIn PDF document text
    • http://ottuk-e.org/userData/board/file/81101361159.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/71717400598.pdfIn PDF document text
    • https://onlinendttraining.net/files/81140624624.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/bubupudisudofaki.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/vusadugazotatixodijaxuf.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/8b2f5182c5658315ab276c21efa85706/34403065319.pdfIn PDF document text
    • http://deleeuwputten.nl/site/data/ws/files/belozabelinakaj.pdfIn PDF document text
    • http://suchanekstomatolog.pl/files/file/39273012893.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161378d7e5adeb---motijafov.pdfIn PDF document text
    • http://gddfboiler.com/uploads/files/nekusewodadiwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=google+maps+app+download+for+windows+10PDF 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_off0000dabe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D5 11040 bytes
SHA-256: 27b8f88849f69bf761b38113c168f5c8e95c5bb272165735ea4075e83432c317
font_02_sfnt_off00010c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C65 18324 bytes
SHA-256: 6376ff9631e5f3792de2aab4586f6524d0b8bbd77376ce65290d8db0a1869625

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