Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aec6410ef3d9b66…

MALICIOUS

PDF

82.1 KB Created: 2021-07-08 07:12:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c501e8b0154bef44be04e2da4fb27d88 SHA-1: f81571c0262cda8d14df1aa7d6774363bd17b032 SHA-256: 7aec6410ef3d9b66f0553da9231cb0eb352a982d1b421cfce6609f5ebe109451
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, embedding numerous URLs that point to compromised WordPress sites and disposable hosting. These links are likely used to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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 https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/1629547f81575086023640a17aaf7181/12131068521.pdf In PDF document text
    • https://upchealth.net/wp-content/plugins/super-forms/uploads/php/files/0dc6a2897f473c6069380b500f58d129/61569586769.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/im9rh9pa52mfu537g06tacbmf0/51834965192.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/85398388719.pdfIn PDF document text
    • https://mclarenquartz.in/ci/userfiles/files/lekabujapevopev.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ae845d412---jalaxaro.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d99f8d6fb62---26853279027.pdfIn PDF document text
    • http://sintellect.ru/Repository/file/wokupagorefefox.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/66c8d498578bb6d9bd9ccb3e7a2510c7/70245611520.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/sexiwebesakotadivowomo.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160864fc377152---finevodeb.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/3m5ngv7ht11fsflh6iu7opqjrv/duzosowodumudipatu.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/3vt6cefh72719u727badj22rq3/83277828673.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/7a1f9ff2b20cd6e3233f0cdfb35529bc/49518283081.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/86e91a5126ce1cb42dec7a3167016a08/39747443802.pdfIn PDF document text
    • http://victoryelectricalsupply.com/ckfinder/userfiles/files/kipufufotapekizedudokeka.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca78d626e3---54331369884.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/fepitipemazifarevabame.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/hd7vtq0bu9eg9u7abhpm3s0umu/bupuzutozojedezozinavewo.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/9636fea94c311134c93ed7a395ceb95c/fesovutad.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160989aa1a3831---17194165213.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=135+nm+to+ft+lbsPDF 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_off0000e02f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE02F 17016 bytes
SHA-256: 89d882c13c34fbdd9e4bf5db771277a7d1fa576c3c55985f8deb6df10d611d11
font_01_sfnt_off00010c91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C91 10288 bytes
SHA-256: a9c3aad35bb26e1f667291dc9d693f9c38df366edc53d98dc160e50b17bad876
font_02_sfnt_off000123ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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