Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3214737cd26e950…

MALICIOUS

PDF

97.5 KB Created: 2021-07-24 07:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2bb198190c0d20a2277316a62598d461 SHA-1: 29a3af89ed62703910eae5b8a26835eb725815ef SHA-256: f3214737cd26e95096c0067adf7152151f34e072c6f13abe2b9307564cb6ff15
164 Risk Score

Malware Insights

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

The PDF contains JavaScript actions and numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://softwarefactory.nl/images/file/tifikox.pdf In PDF document text
    • http://zkojicin.cz/userfiles/file/genasevapakomepamudifeb.pdfIn PDF document text
    • http://superlitefan.com/uploads/files/50218550005.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fee1bf9bb---niluwujanerizeloluvos.pdfIn PDF document text
    • http://ecole.ru/text/images/file/5617644862.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cad372b739d---40977340535.pdfIn PDF document text
    • http://murito.fr/ckfinder/userfiles/files/21362634674.pdfIn PDF document text
    • http://mkngsp.ru/upload/files/xexezezubaval.pdfIn PDF document text
    • http://innova-perila.ru/upload/files/gaxojugavaf.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/a3a2d0cd4ac5a59a3632acda3f8d5809/19110021274.pdfIn PDF document text
    • http://kcntanduc.vn/img_duhoc/files/megasit.pdfIn PDF document text
    • http://skupka23.ru/upload/m/bamipenurulevozokevo.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0214e92236---diwunajekovenaferozefe.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/u3djtqdqbeuvuhjqdf2nm6879l/kapesaberozajekoferar.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/3fd1261ba9b0522ab40e3a4b75982457/ferebax.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/1e612e2139d19124bb2c7c229da8d3c0/67850565151.pdfIn PDF document text
    • https://alice-immo.com/userfiles/file/sewojedut.pdfIn PDF document text
    • http://fundacjaproartis.pl/javascript/ckfinder/userfiles/files/41869334769.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2f4080b33---gubunoropel.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/18140426055.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/677df0d6b99666bd92faf2abea9c8a67/tubupifokosetuko.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/pijuxodig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=how+to+pair+indy+skullcandy+wireless+headphonesPDF 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_off00011209.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11209 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A20 10996 bytes
SHA-256: ebac4962cdb585094dd5327723acc1be0f1b15326802cf76e30ab38710ef2160
font_02_sfnt_off000143a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143A7 18608 bytes
SHA-256: 861d805e523aa193c73eb49c3ec5694cdabf4d1f566423f9801beecb1e89b3d5