Malicious PDF — malware analysis report

Static analysis result for SHA-256 2af88b6bca177252…

MALICIOUS

PDF

81.7 KB Created: 2021-09-01 04:36:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f6194a6f370f764dbd7782bc4a6e1141 SHA-1: d4954fc5d05770a97bf33ef091b909ed3eba3006 SHA-256: 2af88b6bca177252081bcb7cd3d896ec2c24ac998b080114270ffaea8728a1f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links pointing to various domains, many of which are hosted on compromised CMS platforms or appear to be disposable. This structure strongly suggests a link farm designed to obscure the ultimate destination of the user's click, likely for phishing or malware delivery. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://greenearthgardens.org/userfiles/21465885463.pdf In PDF document text
    • https://thucphamtruongxanh.com/Upload/files/nefanikopomiwawixiketed.pdfIn PDF document text
    • http://seritour.com/rsm/files/wodelumajefixetiketelu.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/8dfbb2ef562e4a7f959dcbfb6401f1b6/57127622057.pdfIn PDF document text
    • https://ofly.om-digitalsolutions.cn/upload/files/30410960302.pdfIn PDF document text
    • http://reicar.dk/userfiles/file/70980583226.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/s641btqcst7ur9rpa97n1h2hpp/sikovenelaxez.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733a1bb2a21---xabur.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/6fec9f69939ca6961cb2e523ad04cb81/sejonekaruxex.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bee84f81464---92979127454.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/5398f43101467c1bbd9dfe3014ed4060/vitugi.pdfIn PDF document text
    • https://vntdc.com/upload/fck/file/kolazabazaxofuxadexomeril.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/uto85sufme9g2hsd7bfl43aqh6/pesarineribakilisu.pdfIn PDF document text
    • http://studiodebiaggi.eu/userfiles/files/11992926708.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/c4epk2ko6uok723tnr85i0hujv/46930503081.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/7752827426.pdfIn PDF document text
    • http://fedime.org/imagenes/18244215254.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/9d0667466c58a0fdd32009851c3c0bed/91857037253.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/pifaf.pdfIn PDF document text
    • http://tlproduct.com/userfiles/file/9117192872.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/78611414520.pdfIn PDF document text
    • http://zzzwchem.com/upload/files/bugiji.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610db47691a65---famidoketokaviwapi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=integration+in+physicsPDF 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_off0000db07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB07 10672 bytes
SHA-256: ee9c361f32442ce9a7eebe2bf3585375e32a7a1befdbe83558704defb8f1ef1d
font_01_sfnt_off0000f374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF374 17648 bytes
SHA-256: 91358ff97f7ab02c3ec507a1429baa4be4c429644b97947b2ce0542c5dad1a3b
font_02_sfnt_off00012171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12171 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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