Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c96fa3909b8a18…

MALICIOUS

PDF

74.1 KB Created: 2021-09-15 11:36:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 72b9b767429229d5487189015e381aad SHA-1: a5135ced038d3483f87199786d743eb94f153116 SHA-256: 00c96fa3909b8a18f68c8f3337fdad4baacf7bcf3e65f9f0a8e94b38d237a510
156 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various domains, some of which appear to be compromised CMS uploads. The primary purpose seems to be directing users to external resources, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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 https://huntic.ru/uplcv?utm_term=how+to+draw+a+koi+fish PDF link annotation
    • https://bwawarszawa.pl/upload/file/12206167034.pdfIn PDF document text
    • http://aspbae.org/userfiles/file/41007933419.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/47651322848.pdfIn PDF document text
    • http://i-harmonics.com/upload/files/44292774463.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/67323387480.pdfIn PDF document text
    • https://firesystem.ro/imagini_ws/93220709421.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/nemawik.pdfIn PDF document text
    • https://aquarell.ro/userfiles/file/balopiparukupemolipakin.pdfIn PDF document text
    • http://szolnokepul.hu/userfiles/file/11687060963.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/62489815902.pdfIn PDF document text
    • http://minhphucvietnam.com/uploads/userfiles/file/39163297415.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/jukubodenevujetonu.pdfIn PDF document text
    • https://drjou-vc.com/upload/files/61750015887.pdfIn PDF document text
    • https://lrsdev.com/userfiles/file/91856841821.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/lnkkk07b5vreti3lnmnop2u7vp/bekimugutinopige.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/e23b722f9edc08df9420500db4ee9eba/29518126461.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/sabikiwoga.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/miwuragex.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/36058566026.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/a0faa72058fab70965297ae70bffb967/72938395105.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66124182163.pdfIn PDF document text
    • https://koltoztetes-szallitas-lomtalanitas.excore.hu/ckfinder/userfiles/files/pigatuwux.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///siwinixogowuta.pdfIn PDF document text
    • https://sgicorp.com/userfiles/files/kixedejak.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/eb99e842450ebacc08a7c597d1256971/fivekan.pdfIn PDF document text
    • https://alarouba.com/ckfinder/userfiles/files/sujubodunevedebosokipo.pdfIn PDF document text
    • 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_off0000bfdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F4 10340 bytes
SHA-256: 727a505d75eb57e24130ac1ca3eaeb5087c3130b2e9ba7c8e64f1f19b4c8127d
font_02_sfnt_off0000ef68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF68 16876 bytes
SHA-256: 7b351c5bc325f514a0eb9b11dcb16354ca7a883d2e7180bbe49d46b22014ae65

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