Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ea498fdaa5ad9e…

MALICIOUS

PDF

84.4 KB Created: 2021-09-14 04:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 134f541da2a7da5e789ad883c53ca926 SHA-1: 2eb12645f186aa90effea2c86f6234b9d8292469 SHA-256: 07ea498fdaa5ad9e2d0762c32d0479189641313e69554548247b85120828068a
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on potentially compromised or disposable domains, suggesting a link farm designed to redirect users. The presence of these links and the overall structure point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://universal4shipping.net/userfiles/file/68861399775.pdf In PDF document text
    • https://cremyco.com/app/webroot/docs/file/mebepudolepuze.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109111023382597.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/2d53a03864b0c17d88692647df3c51ac/wuwovoredukaxisunezo.pdfIn PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/16809934992.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/tobaxafufetifido.pdfIn PDF document text
    • http://bridgestone-ice-cruiser-7000.ru/ckfinder/userfiles/files/18484190446.pdfIn PDF document text
    • https://computerzone.pk/file/71662186421.pdfIn PDF document text
    • http://7profi.net/userfiles/file/88510302725.pdfIn PDF document text
    • http://vesimport.ru/userfiles/file/lejosuxoxukalewufitawiden.pdfIn PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/161300abe6ef91---fananuka.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/56810443699.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/6692095310.pdfIn PDF document text
    • https://dafelia.com/files/82583344474.pdfIn PDF document text
    • http://m2m2design.com/userfiles/19461695650.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/36764689474.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/powedugutikuzapuxezifej.pdfIn PDF document text
    • http://familiehollander.nl/images/uploadedimages/file/bajevodoxixuxebuwek.pdfIn PDF document text
    • https://premiersuli.hu/files/files/gitez.pdfIn PDF document text
    • http://szcftz.com/upload/2428042947.pdfIn PDF document text
    • http://studiorumeo.it/userfiles/files/nugitat.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ff7b4409a5---vodafi.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/89101909359.pdfIn PDF document text
    • https://garraldaarquitectura.com/garralda_userfiles/files/zunonenorokasefewoxifo.pdfIn PDF document text
    • http://sieuthikhoacaocap.vn/upload/files/33530711264.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/75033162834.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=ac+market+apk+old+versionPDF 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_off0000e3f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0D 10816 bytes
SHA-256: a6f1f54eb75d94147ef731cdf133bb6b7c8d63cdaa6b5aba28fbeefd414d2f8b
font_02_sfnt_off00011501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11501 18268 bytes
SHA-256: c6342cead2ab5e43bffe7c4862ecb4257dfad2196e75666142c9c9f7caa7eb54