Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e039e1318fe5028…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 20:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 742da0aa4bb49de0d8de8c2cf2a2f931 SHA-1: 32e5a231b9442d86cebd83dc5c5bd8a66be0cc51 SHA-256: 9e039e1318fe50282b139ae6a1aaee417c270b8cf2977024165d6366240eb22d
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, specifically by attempting to trick users into downloading a password-protected archive. The presence of numerous external links, many hosted on compromised WordPress sites or disposable domains, suggests an effort to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to delivering a secondary payload disguised as a password-protected file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://irlanc.ru/uplcv?utm_term=dhoom+2+full+movie+hd+1080p+download PDF link annotation
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/etrbpbqgoqnbbi3qnaaguu9486/74017553254.pdfIn PDF document text
    • http://metall-press.ru/files/sedenedibumu.pdfIn PDF document text
    • http://ausafe.net/images/art/files/70831121593.pdfIn PDF document text
    • http://cga82.com/admin/File/nesegagubadipuxozugover.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/74654548346.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16071b24fca883---62394447190.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/51800316829.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/20577e9843038bee71fa09f086174eb9/mukozabowezipesuxigolap.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/7124381338.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/f150413e0c0500aaada3a8221e0345d9/46554372434.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612576bd2ed1a---62625873633.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/gopekanotozuzi.pdfIn PDF document text
    • http://daedukgs.com/admin/fckeditor/data/file/20210620034239.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/bbc460d3c4e84ac38c1a7d5920b464b1/puwigifikuvubitujudurut.pdfIn PDF document text
    • http://usagimatur.com/files/others/vakifomisivilodumi.pdfIn PDF document text
    • https://lapakunited.com/contents//files/87503621746.pdfIn PDF document text
    • https://kocarbon.vn/luutru/files/78654326301.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607bebf8cf088---79631398947.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/a326dd3c44bf3aeac55f447c9a03adb3/4124679419.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb95c16ca1---22412081828.pdfIn PDF document text
    • http://phannhan.vn/files/usersfiles/files/3412346227.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/vojivonemiziso.pdfIn PDF document text
    • http://crystal-lamp.ru/uploads/files/turajulomixije.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b81efb05---jebuj.pdfIn PDF document text
    • http://klpa.net/userData/board/file/gesilifimexowibol.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_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A0 11152 bytes
SHA-256: 7c9c463e3fa4ca2107f93905ed65c6c755a347189bb3c5cf71be3301cea30f6b
font_02_sfnt_off0001108f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1108F 17544 bytes
SHA-256: ee870b0abb113b4eb444196062f884a5439c636b72fb80b839592901b94b5a69