Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3f96968de085768…

MALICIOUS

PDF

81.8 KB Created: 2021-10-18 18:00:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 363199d9dc3b728484403af179495dfa SHA-1: 1f519b3051a707466f72b717d115842970ca3c7b SHA-256: d3f96968de08576861dbeabf2a14e2c6633ec524ae233ea6252016a11ee8fc40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious redirection tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://suphammamnon.org/uploads/files/fawipelufurejitavibi.pdf In PDF document text
    • http://ambartakip.net/belgeler/file/vebatabereziwolap.pdfIn PDF document text
    • https://mallorcaboom.com/res/wysiwyg/file/10883714323.pdfIn PDF document text
    • http://abwgulfport.com/uploads/files/bulesowis.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/zolasafuwuzizekogijolunis.pdfIn PDF document text
    • https://foodsafebox.com/ckfinder/userfiles/files/zibel.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16166752f9f0e8---junig.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/74309340006.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/fc884269678b4d0ba62e4788a6276234/88827399944.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/mixokitosojivagege.pdfIn PDF document text
    • https://www.bakkersvlaanderen.be/resources/plugins/ckfinder/userfiles/0/files/3683931802.pdfIn PDF document text
    • https://theelementrama9.com/userfiles/files/91986981198.pdfIn PDF document text
    • https://bdblue.com/ckfinder/userfiles/files/dadijabanugidolos.pdfIn PDF document text
    • http://mlsy.cz/images/file/files/46197240.pdfIn PDF document text
    • https://marblo.com/app/webroot/img/files/joxifulowose.pdfIn PDF document text
    • https://shivajigrihnirman.com/singhania/downloads/file/vanixitadixal.pdfIn PDF document text
    • http://japan-railpass.info/images/blog/file/22174033699.pdfIn PDF document text
    • https://faguaflowers.com/images/admin/file/74295720559.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/v555b3ljflrvdl0l61msh2gd03/84387450714.pdfIn PDF document text
    • https://asiapharma.la/files/files/54759248440.pdfIn PDF document text
    • https://jills.reviewz.eu/app/webroot/files/userfiles/files/topelokuge.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/ubk2df01quo1al3qsadbuqf9kk/novorududoxetekitaj.pdfIn PDF document text
    • https://vcvscr.cz/www/www/fckphotos/file/1032991536.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/UsNeCLCzgYg/uplcv?utm_term=1+euro+in+poundsPDF 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_off0000dd98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AA 17740 bytes
SHA-256: 22e5c41fdf878b801dee8bc5308f284a596a1d0a575c531f5b0ff93ec3bfae42
font_02_sfnt_off000122fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122FA 10136 bytes
SHA-256: d2c5eda1a72d0ecd16bda909283b41abc8cce16212cfa392a8f41eec4def2ffa