Malicious PDF — malware analysis report

Static analysis result for SHA-256 111e540087a4e526…

MALICIOUS

PDF

88.3 KB Created: 2021-09-02 00:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 950be4c94359b836a074d1dcfd50e9a5 SHA-1: cf1e96f654fe210f1fc8ba4f247f87c9b35c1dd9 SHA-256: 111e540087a4e5265968e401ab04418abf0a908c85a2e01acb7ccab3269e04d7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS upload storage, and is flagged as a link farm. The 'SE_PAYMENT_REDIRECT_LURE' heuristic strongly indicates a phishing attempt related to financial transactions. While no scripts were explicitly extracted, the PDF structure and link farm behavior suggest it's designed to redirect users to malicious sites for credential harvesting or financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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 https://speeddating.lt/speeddating/ckfinder/userfiles/files/55936501482.pdf In PDF document text
    • http://netpost.vn/upload/userfiles/files/8159381939.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b2acde287---dirulupajomu.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611eaa692bd05---37197790736.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/85034015006.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b5901b0fa---bazezosiripuwajufepupap.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160782448a24a5---rufuxetop.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/p25dg27h0ievm59v2n43k66cq9/87038150873.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608bac0c923b2---80819839281.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/11626995027.pdfIn PDF document text
    • http://nawooelcs.com/upload/userfiles/2021/06/files/210604020129.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/k5legns2t99fq2vtj8fqkaip8d/toburowomuxijisutemunuxa.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/5453122910.pdfIn PDF document text
    • https://studiorampinelli.com/file/tujogozurasejejikimakuwo.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/mabasab.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/81557372777.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/16077e375a8dfe---setigubefosa.pdfIn PDF document text
    • https://abicecream.ru/ckfinder/userfiles/files/xevef.pdfIn PDF document text
    • http://oldtimerclub-thueringerberg.at/images/file/pivufunemovubivolorevo.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/5d223e7d2d5f34cb1e57b88c9cb51e87/21851313867.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7d4ae397d---tuxuwedu.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/95083710710.pdfIn PDF document text
    • http://technocom.pl/editor/file/24351842922.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f86ae7b00b---xosedizinimufazudigov.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/03jls498ipr7t44vro0hko6dv1/norejekojisut.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/p1e12jpjlh6qc304bcl2r204t0/libasapufasutemew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=save+page+as+pdf+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_off0000f58c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF58C 10616 bytes
SHA-256: 9f5ce5e43754172f744cf4b7027f884475efe93ff2fb5bd0a16aca937260b3e6
font_01_sfnt_off00010dad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000125bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125BF 17100 bytes
SHA-256: e2bb215cf4f4ce6b876d3acf71ff3aa75e4b4c34bea83c0ead057ea581922877

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