Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c595341e9dc7fab…

MALICIOUS

PDF

76.0 KB Created: 2021-09-04 21:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d8b2384fbdafb3d3f991dc37e3b9936 SHA-1: 850c7908fdeae15fe66101dd4ff6cd82a89ad119 SHA-256: 0c595341e9dc7fab9fe23527b8607709dd5b0884953b203995b9fdf953ed3383
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of multiple links suggests an attempt to obscure the final malicious destination and evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=reading+practice+for+ielts+academic+pdf PDF link annotation
    • http://fields-on-earth.com/sefozojaxodi.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/c2cf8d748613162a7f25ee6984caf9b7/jizeboguj.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/0d3c9827616de86d00c739adf3ceb765/fibawuretum.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/161290ccdbdc10---xilefefozixamapi.pdfPDF link annotation
    • http://kusadasidentalclinic.com/img/userfiles/files/6705577463.pdfIn PDF document text
    • http://abwessex.com/uploads/files/66319377473.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd476861a9---31708075995.pdfIn PDF document text
    • http://alanaf.ru/userfiles/files/deteze.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/53786513512.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/zekazadoniwojino.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/sopusadisog.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/kejobuwex.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/02495cff1b925803fd8f02638cec7986/fejikobikedebo.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/161199915106b6---32786045432.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/73950078045.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/90ff90b307435232707906a7377a0372/59792669520.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/61db3f780133b4873b9f2c96a16bef9c/sobuv.pdfIn PDF document text
    • http://nineslash.com/user_file/file/46405944702.pdfIn PDF document text
    • https://nguyenthelong.net/userfiles/files/nukaziriguda.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/7c3ecb91bbf6761ba9b57b071c4b2629/79651546333.pdfIn PDF document text
    • http://shs67classreunion.com/clients/b/bf/bf9552935413f2527bbee995f2dfc9b5/File/tudazatejiletesimapexowo.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb0729d1b8---kunamawidoxetebuk.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/41917450701.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/38e7bacedc0ad848020292ebbbd3d033/nemagamanisipiw.pdfIn PDF document text
    • http://chinahongji.com/d/files/lesuviwerafelovekutikesa.pdfIn PDF document text
    • http://ride.hu/images/uploads/files/mokum.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_off0000c5dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ddee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDEE 16784 bytes
SHA-256: ef6f254279fa068ea5e045338d9050d0997e7ac01029249da0886e283ccf9cc5
font_02_sfnt_off0001089e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 11008 bytes
SHA-256: 44674f32ba01dcc8bd9e1d552e547cb5de351f736f7c477146f2055c33c0b731

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