Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ca5fcc311c5c9ce…

MALICIOUS

PDF

86.9 KB Created: 2021-07-07 20:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 626478aebf30636534bb8a00bab96dab SHA-1: acb2cb90ef09ac9de8125fe6435d21172d01aab8 SHA-256: 2ca5fcc311c5c9ce933b4a3db371ad67b3abd062b6f65e9f01ddee3948e01fd6
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to compromised WordPress installations and disposable hosting domains. This behavior is characteristic of a link farm designed to host phishing pages or distribute malware. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080f7d09039d---jupisubepifewobopiziz.pdf In PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d82f6dcc28---pijutis.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/d7gqhn15p4g3vgu813lc5per7s/32630250741.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/91123606480.pdfIn PDF document text
    • http://matstravel.ru/userfiles/file/78189375710.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/2aj3fn3krv24cpus94o8cqs7t1/bubadokidezakujuzi.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/da4bf7ab3277c2bbdc23ad581359adea/zezifavibokivufi.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/11264592346.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/93480231042.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9063c19e0---52975667262.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/55036435542.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/9cde9b940f9361ef46df4146f02d15bc/zoratapi.pdfIn PDF document text
    • http://yoron.net/up/files/fulasefabapudupulan.pdfIn PDF document text
    • http://pwmtqatar.net/userfiles/file/67372337615.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/48630073700.pdfIn PDF document text
    • https://mmszke.hu/files/file/61685231403.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b9991055c---23847748912.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819ff439c8d---favofajogebanuwipofezam.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/biluditafule.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160782910235af---83373357756.pdfIn PDF document text
    • http://kezmosas.hu/files/file/95772960196.pdfIn PDF document text
    • http://jump360.co/upload/files/20210616094242.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/52927d8123ce9a35849f1051c1adfc0c/livaxiwedumoxugedupowetik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=broome+to+point+samsonPDF 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_off0000efb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 10420 bytes
SHA-256: a2a9ea289ded712ed09ab1bd2510ec22105cbf53df3b11c4b6de7e5e68466b1e
font_02_sfnt_off00011f70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F70 17872 bytes
SHA-256: da8dd6e872b75898f06e8093016c16b0e5d20b7ac87e8f7f11b1e09beb183a26

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