Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbce9296fe616035…

MALICIOUS

PDF

77.8 KB Created: 2021-09-04 18:28:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d5cb74cec7cd53a414366643fb2b0fcd SHA-1: 217a684f2186e5a05412b2cbdbcab6640015bd61 SHA-256: fbce9296fe6160354544a4e06ece0996b31251bd68fa8000977aab2ce52b8964
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://crewmak.ru/uplcv?utm_term=manual+do+multiprocessador+philco+3+em+1 PDF link annotation
    • http://www.ciesol.com/ckfinder/userfiles/files/81585393478.pdfIn PDF document text
    • http://xn--tnqz8hz5cb8l.com/upload/files/43572413945.pdfIn PDF document text
    • http://tavaszitura.eu/userfiles/files/89169922979.pdfIn PDF document text
    • https://kligi.viart.lt/ckfinder/userfiles/files/97172994919.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/segorimadepil.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/509dfda8b80c28b2713a7145e82d92b6/pomufirijovegajurazete.pdfIn PDF document text
    • http://chamdure.com/DATA/files/nekelavurazunanugiwulapab.pdfIn PDF document text
    • https://okazionche.com/files/zewapifadiza.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/lemunevanon.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea66c0d5a---fozusurixazuzedafibagupat.pdfIn PDF document text
    • http://olympusflights.com/files/files/73771317685.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16129e15069b9f---14716776858.pdfIn PDF document text
    • http://jeremypourstarlight.com/clients/5/53/539822683240d2210db56c0084569a8b/File/68240381327.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c27567e9f8---kizifubunimazuwavexato.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2a102643b9---jitutakoxifiv.pdfIn PDF document text
    • http://gsemilia.it/userfiles/files/45964704772.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/retiwuvedu.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/7srbgrprvi7adof58dldke02t7/59999273357.pdfIn PDF document text
    • http://webbuilders.com/files/file/98334292138.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/403572098001f84685e7b8d2f5ad1a43/94560476693.pdfIn PDF document text
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e5600544522---80511844224.pdfIn PDF document text
    • https://adikketiga.com/contents//files/78577329482.pdfIn PDF document text
    • http://brilliantsolarpaneling.com/userfiles/file/11012245676.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/fumuduzodim.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B8 11096 bytes
SHA-256: ef4244ad920f03e50c610fc74503147192b9e6d7921dd50088a0c5a40c478e32
font_01_sfnt_off0000e05d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE05D 19192 bytes
SHA-256: da989dd39b944c7cff19f46bb88b7b7b803c3b86c471756f33761de0c677437a
font_02_sfnt_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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