Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e37479091561cf…

MALICIOUS

PDF

71.6 KB Created: 2021-09-30 22:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: c448aaa2d7ede9667534822a433f03b0 SHA-1: e5c7572c30ff8337a36feb6ceb797bd8494445b5 SHA-256: f0e37479091561cfa085d70040ed4be5da7236750cff335edca7cdb8cfba85b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to obscure the final destination. The PDF structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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://www.jobibon.com/admin/userfiles/file/48010738091.pdf In PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/52410aa73c18a65f980c742954ba9873/turutexamapugun.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ffb1f9203f---73435312633.pdfIn PDF document text
    • https://namphuctourist.com/userfiles/file/tefiziwepedewujufejumu.pdfIn PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/5b7586bf7f03239bb8347d4c111e0c4b/64347781697.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/63807047471.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613848626cac5---48070980016.pdfIn PDF document text
    • https://mashura.co/userfiles/files/fikirepepasararosikuzokax.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/42496515034.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3dff48b05---54007076223.pdfIn PDF document text
    • https://fitness-base.tw/uploads/files/202109242157168645.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16152b02ece2b6---wojixuxole.pdfIn PDF document text
    • http://studiotecnicostradi.eu/userfiles/files/77008314747.pdfIn PDF document text
    • http://fulepmark.hu/nyebu/fulepmark/userfiles/file/dafomad.pdfIn PDF document text
    • http://gameometria.com/assets/ckfinder/core/connector/php/uploads/files/gowajomilerizegitari.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210920003649.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/kimopiwulalilosumisedezo.pdfIn PDF document text
    • http://kmimmigrationlaw.com/userfiles/file/99021048766.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021091411553882.pdfIn PDF document text
    • https://mttrasportisrl.it/dati/upload/file/77299285040.pdfIn PDF document text
    • https://larrialdiak.es/files/galeria/files/zevewaxusub.pdfIn PDF document text
    • http://laihoawedding.com/app/webroot/upload/files/bijobexavid.pdfIn PDF document text
    • http://morecoredesign.com/images/imageUps/files/19918097158.pdfIn PDF document text
    • http://rhondadejean.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26872620201.pdfIn PDF document text
    • https://pottoka.info/files/galeria/files/kirivawulatolavarubadoz.pdfIn PDF document text
    • http://silver.jo/ckfinder/blanc/files/dajulotodapuwojamunut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=wordly+wise+3000+book+8+lesson+9+answer+keyPDF 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_off0000b625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB625 11240 bytes
SHA-256: e13fc1c11c5dd43c1b3f594ac019e4e246bb40384b585b32fddab2313c338308
font_01_sfnt_off0000d0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0A5 15512 bytes
SHA-256: 4694f12eda4be255fab17ebcd59cdc6dc808b49f3f14d3f2f9fe3bd4bbae009a
font_02_sfnt_off0000f80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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