Malicious PDF — malware analysis report

Static analysis result for SHA-256 69019811fa5916a6…

MALICIOUS

PDF

80.2 KB Created: 2021-09-16 05:21:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: cffbaf70eb38d5feca8d43f6405eb3d4 SHA-1: 13af371bee07a8cbc0817bf1d17a920c47daef34 SHA-256: 69019811fa5916a6e9f245fd184492a8f04af8b67521e33b0f649b4a83a570aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links to potentially compromised websites and disposable hosting, indicating a link farm strategy to redirect users. The PDF structure and embedded links suggest an attempt to exploit vulnerabilities or trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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 http://www.anaja-inter.org/public/file/23800284974.pdf In PDF document text
    • http://yuh-tarng.com/userfiles/file/batubonebizusopozujek.pdfIn PDF document text
    • http://autoscuolauniversale.it/userfiles/files/99117451682.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16137e70d738a8---bunivetexo.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/gexos.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/647fcb6873560a9954a80105c06026e3/57428173813.pdfIn PDF document text
    • http://xinchenfast.com/upload/file/lizufadisimovekax.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/poxeviba.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613d058f468ab---puxarepofo.pdfIn PDF document text
    • http://biplano.eu/userfiles/files/55240399901.pdfIn PDF document text
    • https://inprovitcentroamerica.com/ckfinder/userfiles/files/16058649883.pdfIn PDF document text
    • http://automyjka.pl/automyjka.pl/userfiles/file/kikopiragopidopa.pdfIn PDF document text
    • http://nikacarpet.com/My_Project/Hamishe_bahar/ahar_img/files/43171501754.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/mupigokolutuvu.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/dodifumapoza.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130994bdfb59---volituko.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/xuvobafitagim.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/33452850670.pdfIn PDF document text
    • https://0900107678.com/upload/file/56715335080.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/5phcpd378va1s10kd4dlcu2na2/33687556603.pdfIn PDF document text
    • http://jdjcnc.com/upfolder/e/files/20210905203654.pdfIn PDF document text
    • http://quranday.org/userfiles/file/9049004261.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/tukifiriwoxagezogenino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=pes+2020+obbPDF 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_off0000d851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD851 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF063 17432 bytes
SHA-256: 66d15b7b627115a3923d02bfc9c95661cdd5f4972bf2700bbcd9ad2b3e487874
font_02_sfnt_off00011daf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAF 9880 bytes
SHA-256: d97fb0ff1b83da06fc62a9e3e4a3feb2eb3b5fd81c65d6da0fe213f62c44ee36

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