Malicious PDF — malware analysis report

Static analysis result for SHA-256 54e0963af8e726c1…

MALICIOUS

PDF

78.9 KB Created: 2021-09-07 00:58:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 4232274df1132f04e581d99477af3ae7 SHA-1: 6e4da2fd7977e80cee769e9f1728818e4ef084ea SHA-256: 54e0963af8e726c14fb3805f150e8b28b2a7b15b7030ed105130a60806efa4d5
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads. The primary attack pattern involves luring users to these sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://canadianrockies.info/files/file/teziratabejaru.pdf In PDF document text
    • http://hiniceshine.com/upload/92786605210.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/kaxefupawilasa.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/ded3mk3ut30arp8lmpq1jpok8n/86404522298.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/35r4hf15do9rp3t942isilvsn2/70936152450.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/63705019153.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1b7ff6f228c5a8d9e9a6de11acbacea1/19400999884.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/zewojimoxofire.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33d9b96d24---20662170335.pdfIn PDF document text
    • http://pastadimatteo.com/ckfinder/userfiles/files/96948423549.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/zunabufenifixosumej.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080d6e72fa3f---sonoguburewepirezi.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/gidofafixanelis.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebc9f327ca---tasozavojofu.pdfIn PDF document text
    • http://onellenorzes.com/uploads/files/zikenobujujetilonodox.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/pilabexekuwiki.pdfIn PDF document text
    • http://k-sta.kr/FileData/ckfinder/files/20210728_6DFE4E752D1F2C2B.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/99810685946.pdfIn PDF document text
    • http://polaryachts.com/res/wysiwyg/file/futobifapo.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/2ffe926703ed6db1f8dd5707ef34ea7b/19310193804.pdfIn PDF document text
    • http://hodori247.com/uploads/files/85530370632.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/6988757449.pdfIn PDF document text
    • http://predit.ru/admin/ckfinder/userfiles/files/80561326971.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091e752bff6e---83382551743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=juan+carlos+onetti+biografia+pdfPDF 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_off0000cbc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC5 18596 bytes
SHA-256: 5e809df533be4d5badf4c570ec68d261ccfde41d29c366579146e5c6f2c605d0
font_01_sfnt_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 11024 bytes
SHA-256: ebf61c515dfd1c87a05acf17b3558745df87ebd3917906100f639a3642555032
font_02_sfnt_off000115fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1