Malicious PDF — malware analysis report

Static analysis result for SHA-256 aeddc06211a585b5…

MALICIOUS

PDF

107.7 KB Created: 2021-09-07 07:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0166714784396fbc61c7154edc6de9f2 SHA-1: f2398ae190c00a7af78844af0ec87d5ec53c85e6 SHA-256: aeddc06211a585b5b5c20bcc4fef8bbb6e06506686676fe73f7fc1e898b35da8
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9828

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://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991297570e8---7205129216.pdf In PDF document text
    • http://akcjonariusz.com/UserFiles/file/25570229643.pdfIn PDF document text
    • http://szentimresiklos.hu/upload/file/kukugogakexazo.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b7d6cfcd4---raxelinolig.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b787436545d---8146685039.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/5cio6o5rams5eqjhs49c1rotnh/29957238145.pdfIn PDF document text
    • http://lycee-elm.org/userfiles/file/wefukavudigexogizijinamuf.pdfIn PDF document text
    • http://poaglasses.com/uploads/files/202108210313306830.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/92489468728.pdfIn PDF document text
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088f4ef65998---56053430257.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/22601054459.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/31978875556.pdfIn PDF document text
    • http://cathugo.de/res/wysiwyg/file/11557330659.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a322bc6f8d1---wosazemiromijisedajekomav.pdfIn PDF document text
    • http://greenbiotech.vn/uploads/userfiles/file/woxetabigetixoviku.pdfIn PDF document text
    • https://lesura.net/userfiles/file/ziwed.pdfIn PDF document text
    • http://greenvisioninternational.gm/userfiles/file/lokisegibaneju.pdfIn PDF document text
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/podomiwurimekedu.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/tdk6ogjkcsoq2p566lsqvmqovr/kisifu.pdfIn PDF document text
    • https://riwg.in/userfiles/file/woputobemoselolevabaxab.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/58815690423.pdfIn PDF document text
    • https://total-sport.pl/img/upload/files/18303205044.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/satesutugerukiziruvu.pdfIn PDF document text
    • https://kawanmto.org/contents/files/91321595083.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/v6c2m7pmhv40tlggerllnpnqhi/67361147527.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=yajur+veda+pdf+englishPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 16132 bytes
SHA-256: 071bac7a3a90310621307d68123817e30fba7c89f9e5021c4391eb43bd8b9137
font_01_sfnt_off00012c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9F 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_02_sfnt_off00013525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13525 22984 bytes
SHA-256: e4e1f973ecdd633c037153d37054d0f2782e48614006021c761241ed8eece593
font_03_sfnt_off00016f58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16F58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off0001876f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1876F 10840 bytes
SHA-256: 26d2b4c03e375ec49ba3282e2840bdce4539bc5ed9c6aa07614893216c6a7df5