Malicious PDF — malware analysis report

Static analysis result for SHA-256 562e08e59dd1606b…

MALICIOUS

PDF

89.4 KB Created: 2021-07-17 20:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: e631d0d50d9d51a50efa5c7cd5974a04 SHA-1: 028cbb8c37b015928b1a3efa9464a7a3d18c030a SHA-256: 562e08e59dd1606b9fb497185370181a1f705ee7f13fdd9c5f294cc9b264a726
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm hosted on compromised WordPress sites, directing users to potentially malicious PDF files. The primary attack pattern involves luring users through these links, likely for credential harvesting or further malware delivery.

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 http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160a932d176f8b---jubewavi.pdf In PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9183d8c30---judademepifepogagime.pdfIn PDF document text
    • http://gardatrans.com/content/Files/80509216563.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/sknpftpk45btq7op38hrkbe91e/36094888465.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/xuwowusiviwoduvupe.pdfIn PDF document text
    • http://turagent007.ru/userfiles/file/sifawuxunamejesegab.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/77784830009.pdfIn PDF document text
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/bf1880416dc7a80e6d99a62a9af9f812/ritijenexojoxa.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd2833daaf---44753950868.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/fuxuzadu.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3e36e15170---gufaxipediler.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089359f30a0a---dufitunom.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aae4d3fe3---24021265892.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bca186df56f---41209580774.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c57aec8b0bc---34390727665.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/h21po2aecqafjlfhd3qrnemhi9/rorodadaf.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/ce2t67tqsphc5u5ebgfsk8vdr2/96492662292.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/fevigubokelubik.pdfIn PDF document text
    • http://barbusci.it/maisUserFile/file/54225000274.pdfIn PDF document text
    • http://aliglobshop.com/userfiles/file/75022369217.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f04cb179e43---bopimesijagumazafuv.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/2caf802f266a61adc20173f5a3d2d58d/xepopuxepivujuki.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f104b3d0d7---16750260047.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ebb+and+flow+thesaurusPDF 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_off0000f349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF349 19672 bytes
SHA-256: 0ee7dc77260c08c56053e24a8982aaf2fe6dff387e4b3d24a7b0f0dbb369a6a9
font_01_sfnt_off00012686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12686 10668 bytes
SHA-256: 64aa1760ba48b3f3a596b81b2438b71281a48664cc626725b89c6d9dcbf8745d
font_02_sfnt_off00013efd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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