Malicious PDF — malware analysis report

Static analysis result for SHA-256 37008ce54bbc9508…

MALICIOUS

PDF

109.3 KB Created: 2021-05-30 21:38:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5b59438d6f2f35489d0e1a232b9e96f0 SHA-1: 04ce9ebca72cb4e2e9741bb753630640b218d01b SHA-256: 37008ce54bbc950812fbaa70aa13ca7339084e47377e1ae34007f342db1d8010
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan distribution attempt. It contains a link farm pointing to compromised WordPress upload directories, suggesting it's designed to host and distribute further malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is part of a phishing campaign or a downloader for other malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c996d916c1---bisituz.pdf In PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/9657c45254e7eb1b93a3081155d9a318/gawas.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072de9b7d9ec---65888516.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/kasfmvg8egsktt6jn77p0ml7p3/lutiratomesukuvubotojik.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/52778254985.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa58c5d710e---24278879508.pdfIn PDF document text
    • https://centrosteadycam.it/wp-content/plugins/super-forms/uploads/php/files/9c0b7e8e6a59988b0adf43254154dc0e/sorewofanixogezaramo.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16072b1a767922---zikuwuranemiruv.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a29a3caf5---86804484702.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5ad5dab60---74090261555.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086578fdd8b2---97391083681.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/ff97d6dcceaf84b76bc84f1c7b1980b9/rejopi.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/mafavuvivefi.pdfIn PDF document text
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/725cck86vk8k3gp6kavva5a654/57046849310.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021052202300773499.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c777a4b7b1---8482900085.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c3f7555f8---lakewali.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=is+horizon+zero+dawn+frozen+wilds+worth+itPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16365 4860 bytes
SHA-256: 1f3d8f7f47e116cd1aec4039cb311968100e565e0d6849b596ef316ca1f1de51
font_01_sfnt_off000173f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173F1 11228 bytes
SHA-256: ef56b9c73e0f58f5b04de6b88585660c096b47b6566dce961d0dede6670e8473
font_02_sfnt_off000199fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x199FC 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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