Malicious PDF — malware analysis report

Static analysis result for SHA-256 d509f3f207332b4d…

MALICIOUS

PDF

112.0 KB Created: 2021-07-16 03:53:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a01af97ad3ee3633f12bcc677110e8e2 SHA-1: d53a51d119c9442905d4e2e419def5b490c3a37b SHA-256: d509f3f207332b4d2d5413be3179ed3682d87e448e3d6dea0176d0d693d36fe0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm used for distributing further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to host and distribute malicious files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074368f16553---vekunepugelokejiponaja.pdf In PDF document text
    • http://straub-online.ch/userfiles/files/kegemonapotosegadarawo.pdfIn PDF document text
    • https://dintek.eu/uploads/file/ruxafariluzolopubogubisi.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c49577586d5---xalikatesopizumujuwupa.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vt4nr777dma7cc29r7gm67l466/fepisa.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae250e1e970---48525620998.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/2084fff3f0790cf1023916edd8a1957f/nimumal.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/gazavakidatoze.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607587b64e17f---21635978872.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/kigipavaweraneveka.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///baxidifakifuburube.pdfIn PDF document text
    • http://chinazzjx.com/d/files/44710741501.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/36151542245.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608625276bf6b---zupowunibetakilirekojij.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/gro0empnmdrfm4dbv1sbdck3lc/54674800617.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210703083440.pdfIn PDF document text
    • http://daoltrading.com/userData/board/file/kopuwituguvodaruv.pdfIn PDF document text
    • https://saam.vn/images/content/file/68854818953.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/tnl8cb6t2km6lhvds6kodsfknf/budiforekeg.pdfIn PDF document text
    • http://nhs-carpediem.com/clients/46367/File/pakiwenirabevapotejan.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/zemopepa.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/93533283683.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1d842102---finib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=geography+notes+for+ias+prelims+pdfPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/23bfdc6f70d076ac1c3fe6d327fecb14/80839931029.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_off00015217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15217 17396 bytes
SHA-256: a8ce6d2b24b91c449c15a896ca3d538448990409c172cd0d92f0e42e702b0896
font_01_sfnt_off00017f53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001976a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1976A 11096 bytes
SHA-256: 992a25d208bbed437f8bc97239ff04e32aebb6a4185d62d237ecadf9c7b7561e

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