Malicious PDF — malware analysis report

Static analysis result for SHA-256 47823790270aa4bc…

MALICIOUS

PDF

89.4 KB Created: 2021-07-28 12:21:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6cd0068d73cea83648a22b5f6a52c7aa SHA-1: 04221f18f03204d6019490157a4dad66eace3509 SHA-256: 47823790270aa4bc7463d5b881013812cf9093c9f23c2c16786b9e42762dab80
196 Risk Score

Malware Insights

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

The PDF contains numerous links to potentially compromised WordPress sites, indicating a link farm designed to redirect users. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly suggests the document's content is related to financial instructions, likely a scam. While no scripts were extracted, the PDF structure and link farm behavior point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://apsons.eu/files/file/76780910703.pdf In PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb917397da---94192322899.pdfIn PDF document text
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c6d96284c---dawutoper.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/658b4109bc9249448cc5af7abd1a0a30/28052975071.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/ecaf782509a218ed6e7b31e35fdf9e4c/nurezusezabitumapu.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf7f81c3c4---solukuviduvasezu.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/0214beb5c2a49f324afc95d5accf215d/nopen.pdfIn PDF document text
    • http://relocationservicesgroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6dff302f8---17370508701.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1e200257c---36964862415.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/ganofepexopinafijuz.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160cad039444c8---wajunigafuxoxuzakigeb.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/39901304883.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/l3lqalu894v650d8e8ub2uuh68/fupuwuzimeg.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cb43903d5---dovowavexoz.pdfIn PDF document text
    • http://vagtteam.com/userfiles/Files/13010151725.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607631e0339af---piveb.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b135b171da7---57669709047.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/267rsjrti85slv6dr787cjaqg5/lirawatipedozefazokuzunu.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/2m0v4fv4v7a1bad7pucp7dtnhr/biwopetaze.pdfIn PDF document text
    • http://happy-travel089.com/CKEdit/upload/files/68912011131.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/46540720345.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/47761101666.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/178jtm29bjcb1679njm8140ivd/53918688599.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d553b9192b---kezerem.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/kkur901jgq6iuqgcft282jlelg/28394398118.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+apply+for+capitec+bank+account+onlinePDF 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_off0000f648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 10828 bytes
SHA-256: 77039b8ecfe4237b6b1d85ed2866058ce33448ad926fe28d0b60fcc7b71f0f01
font_01_sfnt_off00010f3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001274c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274C 17508 bytes
SHA-256: d9bc29b1dcf5dd9e4e76997306b38c7b30d50954af8abe9302cc9ceec65b4124

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