Malicious PDF — malware analysis report

Static analysis result for SHA-256 061ce3d1cd7e0fe2…

MALICIOUS

PDF

73.9 KB Created: 2021-09-12 20:35:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1c8dd9082c9b3657dfdb10fe96f687a3 SHA-1: 1b9f6dc3b4db29437802399c7105dbd692c6c424 SHA-256: 061ce3d1cd7e0fe29d3b7b4f2a69d6c3e6df49e7148c659839a0f5a7e120c2dd
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed for SEO manipulation or phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious content or phishing sites. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://cursosadistanciayonline.com/medios/files/96118819548.pdf In PDF document text
    • http://siripanyalamphun.com/user_img/files/73511248475.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/gaxaxujasujumun.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/losudoz.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/dokuraseb.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133ae4404559---74464693839.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/4c5dfca9b3bbbc5c6215b5bdec8ea38a/85595652933.pdfIn PDF document text
    • https://elsadaulte.com/ckfinder/userfiles/files/nokotikarafuxumaleg.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/c0b7c0e2330c663b79df00904b529fe7/71179935956.pdfIn PDF document text
    • http://freehajjandumrah.com/admin/admin/uploadfiles/file/45909264854.pdfIn PDF document text
    • https://www.grdr.org/paidel/ckfinder/userfiles/files/66933286307.pdfIn PDF document text
    • http://discus-rus.ru/upl/file/51773100827.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/53723065575.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/datemuxogev.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/pegojovapep.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/97356257197.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/kuxifidubolejil.pdfIn PDF document text
    • http://birizgardenhotel.com/userfiles/file/dolupusesepefa.pdfIn PDF document text
    • https://nilsahost.com/calisma2/files/uploads/59084821276.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131bb575fbb7---bidapiwirugaw.pdfIn PDF document text
    • https://impulsa.mantareys.net/uploads/plantillas/files/mojilibesunu.pdfIn PDF document text
    • http://abriganature.centralcms.cloud/galeria/files/5072510124.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1630647515.pdfIn PDF document text
    • http://mamitobe.ru/files/file/26279308997.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/vufevam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=coming+to+america+1988+123moviesPDF 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_off0000bbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD6 16480 bytes
SHA-256: b18397f22875b1bf9fb45bd0152d83356768b2c7d004e7a6aa0f7d8441777f58
font_01_sfnt_off0000e648.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE648 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5F 11344 bytes
SHA-256: f7b6df62cec0b75482e9f843b4497f0b8ba198c528648a78e97220c1aaf15e06

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