Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d25ae33f9eed69…

MALICIOUS

PDF

88.5 KB Created: 2021-07-06 23:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4cc0149b2eb6f3d71e4562c248680a0c SHA-1: cbcc14ad4f346b355c4646b66d46945536047144 SHA-256: 03d25ae33f9eed698ac0fb4f99bcc7601571611d538d9f947a7596377f4e7d4b
156 Risk Score

Malware Insights

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

The PDF was flagged by ML and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://accuratesearch.com/userfiles/file/1554753864.pdf In PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/gefofabegikatozoxerigeto.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/165d5d77955ebde6ff4b8fbe5e31de4d/77284334563.pdfIn PDF document text
    • http://smartvoicecom.com/userfiles/nodoraxabexoda.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/gshl78d48lr40nm8mah30a4ibm/49952935406.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/10097683802.pdfIn PDF document text
    • https://acgroupenterprise.com/userfiles/file/nuredepiboka.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e182aa08a5e---gagami.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fad7e74e67---82576403978.pdfIn PDF document text
    • http://xn--h1acbpobggs.xn--p1ai/data/files/vizibebebojopuluse.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/5382ca3fce968dbf263f69b5dc49521d/zapopi.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/9sca9c72j05ia91c61vbjb102j/dajemaz.pdfIn PDF document text
    • http://makesomenoise.hu/upload/file/87385261781.pdfIn PDF document text
    • http://learningkey.org/userfiles/52400547940.pdfIn PDF document text
    • https://gamedunyasi.com/calisma2/files/uploads/bijizitibisosudo.pdfIn PDF document text
    • http://htwy.com/upload/file/mutixulelakugujotija.pdfIn PDF document text
    • http://tfforming.ru/d/files/35978088086.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/50704045571.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/n915omkgbrlqbpami9puoe5hf1/37966869364.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607920b11108e---konulerarisezi.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/pevaralaline.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083624ad9d82---36093946163.pdfIn PDF document text
    • http://elitvorota.ru/f/file/kevufijev.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/62065940897.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/74210659876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=can+dogs+eat+cashew+peanutsPDF 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_off0000f85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85F 10772 bytes
SHA-256: 27ea67477c963e05b838852f57df5917e0cbaea543bfba8510403c5cd5b5075f
font_01_sfnt_off00011109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11109 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001291b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1291B 16808 bytes
SHA-256: 11f761e6b69ad0a6a59e121d35ad6d1e4c30fe62e034c5437ab1807633d3697d