Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf9d84416bc3e68…

MALICIOUS

PDF

124.0 KB Created: 2021-09-04 21:04:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 426920920fec0a2c9e69d25ac1ed4155 SHA-1: 55cb74f180d9ccfd4e7ebff4908a0137f472e0e5 SHA-256: cbf9d84416bc3e68f4366e2be121cb94cb1890d8530ec2b48e22b6ee74be3cfc
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to compromised WordPress sites or disposable hosting. This behavior is characteristic of a link farm used to distribute phishing content or redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/216e57855b9a263105315012dddfa1d1/68040877636.pdf In PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611528a8227df---17666932286.pdfIn PDF document text
    • https://aeap.com.br/ckfinder/userfiles/files/zaroni.pdfIn PDF document text
    • http://nhahanghienminh68.com/upload/files/lexuxodu.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/duvoxepa.pdfIn PDF document text
    • http://neoneofytou.com/ckfinder/userfiles/files/84052868216.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/zavitufaxu.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/941e49c202b463c3a18e2af4d4f92b03/17974822210.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/pebisonezoxidiwebizo.pdfIn PDF document text
    • http://keyflounge.nl/userfiles/file/posevuwokipe.pdfIn PDF document text
    • http://crmrealty360degree.in/userfiles/file/39836204300.pdfIn PDF document text
    • http://funperm.ru/content/file/tawomojowakanij.pdfIn PDF document text
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/3eb3e03f48d989b5c9092c7ba8510d51/fowupasetupesepuxikomip.pdfIn PDF document text
    • http://marcus-1.com/FileData/ckfinder/files/20210728_AB53D065E1C23CC9.pdfIn PDF document text
    • http://broadmoor79.com/clients/864886/File/78210945437.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f71447a60---88667103421.pdfIn PDF document text
    • http://mclarenquartz.in/ci/userfiles/files/fajajovutitozibawujo.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9b5e95bec---83316059083.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/kigifuzaxulewibogijiguluz.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/1629ea90aa31f0dbea2abeaa813860ce/21920903145.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f3dd1d57ac0---43285386282.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612d00c4a765c---bebabalijixexizo.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/4a78657849bd9a7602dd0c3a12e47251/dudabovofu.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16088b77107979---poguzitekedoxaliwedugulob.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/2062167056.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=el+feudalismo+y+la+educacion+caballeresca+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_off00017725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17725 21956 bytes
SHA-256: 72f85b0dfea5a7ee8b7094205480cf18cd8f7a9d88dcc8fcf8ab7de6d35e2c28
font_01_sfnt_off0001ae89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6A0 11020 bytes
SHA-256: 765e07b017f48a2a17ed896b38c736a231157dd9c6e41890ef0b950325fad15f

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