Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7d28070d26808b…

MALICIOUS

PDF

73.2 KB Created: 2021-09-20 02:03:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ac8f88fc9e891c8e9277253c8ae2a3f1 SHA-1: 0dd93a8167bcc3aa7bdaddb223e2d5a226d55102 SHA-256: 9a7d28070d26808baef0e0038b83380faccf04d13b69612f13ceb257aa33a74f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised websites, suggesting a link farm designed to trick users into downloading further malware. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' reinforces this assessment. While no scripts were directly extracted, the PDF structure and URL patterns are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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.
  • 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 http://cascinamana.it/userfiles/file/rabegoripimibelimig.pdf In PDF document text
    • https://vitanov.rs/files/vuralagazojewikus.pdfIn PDF document text
    • http://sjzhtchem.com/upload/files/59046233940.pdfIn PDF document text
    • http://sprostredkovanieuverov.sk/res/file/kuvosubopagevez.pdfIn PDF document text
    • http://familiegravesen.dk/ckfinder/userfiles/files/kisexidamoz.pdfIn PDF document text
    • http://tranhdaquydep.vn/upload/files/33429708305.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/56287847476.pdfIn PDF document text
    • http://debeight.net/UserFiles/File/57164825335.pdfIn PDF document text
    • http://primethailand.com/ckfinder/userfiles/files/kufutafejolokopake.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/5f6322c1eea99d55b3cc71bf580be1b3/91110746042.pdfIn PDF document text
    • http://altiro.nl/home/tjerk/file/lorobopa.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/abf25b5320bb17fbb435dd9498267489/54083355540.pdfIn PDF document text
    • http://chikatere.com/Upload/files/85851584704.pdfIn PDF document text
    • https://santchavarabed.in/ckfinder/userfiles/files/67680121609.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/cdfd07e6433d59f3e6054822adce07ce/sebavajem.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/99301470790.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137482a35bde---nusupukubapa.pdfIn PDF document text
    • http://hengfengpaper.com/filespath/files/20210913161740.pdfIn PDF document text
    • http://pinxedien.net/upload/files/kanagutevux.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210909070333.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16138cafe16c19---94195613921.pdfIn PDF document text
    • http://cosmosimpex.com/app/webroot/ckfinder/userfiles/files/1503904606.pdfIn PDF document text
    • https://mastirz.com/userfiles/files/71423170202.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=frp+bypass+easy+downloadPDF 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_off0000be99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE99 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d6ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AB 16280 bytes
SHA-256: 43656c92f39e12a3c637bd6cd4c0322de913164134aee0d6cba30a11863ca5f3
font_02_sfnt_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 10512 bytes
SHA-256: d73bd4c9b5b5f16054390c9ef5693da84ed58e9b245fcada5feb0cee0d37e7d3

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