Malicious PDF — malware analysis report

Static analysis result for SHA-256 000a6e7ca0883545…

MALICIOUS

PDF

98.6 KB Created: 2021-08-08 12:03:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5d8eb9b708aaa761dcb0afe11131629c SHA-1: 0fe830604bc5284b98cfc3c13f189c0798ea14b6 SHA-256: 000a6e7ca088354514e295afd52fa15e5b629b455fe561a6ae332dc667e02fc7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9914

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://awlights.com/wp-content/plugins/super-forms/uploads/php/files/5725079e77ef90960f378d4d13cc7577/jatibujufuv.pdf In PDF document text
    • http://startmatbaa.com/userfiles/file/10361190785.pdfIn PDF document text
    • https://uniqrelation.com/userfiles/file/goponunakut.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160790fb47c70c---89798081301.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/jetidikusuzave.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef0552fb91---serutomuretezil.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/f778f55dc1388ae2dce8d5a370f4dc37/todovobabis.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/sowibiteguwibolomedowak.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/zupoxumarigalesizawajem.pdfIn PDF document text
    • http://maxidmum.com/images/upload/fck/file/sabivezewe.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c23b445dd---xizinidixaribolun.pdfIn PDF document text
    • https://xuantruongtech.com/images/ckeditor/files/33272250725.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/65555946977.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/14khmrki25jecamo3cp5ppp3re/dexudusasujof.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/62052216478.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16072b69c883bc---bufepurivujizo.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/gapuzefexiwetuf.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/45973460252.pdfIn PDF document text
    • https://www.stock2morrow.com/ckfinder/userfiles/files/2229878515.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/840306366eec75391d72cf49e44c3632/divajiguxozidetigif.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/3c5c55ec490d07e28299f7e9c8740fb4/tenevabimopumexuzilu.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/ketedu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ingenieria+mecanica+hibbeler+12+edicion+pdfPDF 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.netReferenced by PDF JavaScript
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseReferenced by PDF JavaScript

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001278b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1278B 11064 bytes
SHA-256: 91aaddadd37613bf03cbbe39dc826cd2b80b2658b1318e2bc2ea49ae9c0f4e7f
font_02_sfnt_off000140a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140A9 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_03_sfnt_off000148ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148AD 20056 bytes
SHA-256: 25e021889dd3812d0713113ee9c4e98d34bd6997469a43360262a47cd1ee3f56

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