Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b098048e2737cff…

MALICIOUS

PDF

79.7 KB Created: 2021-09-12 03:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9466940693a55840711c96a52594c55f SHA-1: 67a4a02feac1038e65056d4eee250c4f197f6f8e SHA-256: 7b098048e2737cff8254212689927b4948b554c6678f2fa814b3dbe20e0e5812
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous URLs, many of which are hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of external URIs and link farm heuristics points towards a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wastran.ru/uplcv?utm_term=mobdro+streaming+app+ios PDF link annotation
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135a83cc1fac---momavogep.pdfIn PDF document text
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/wavinitupobafifup.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210912062653_g8mk50.pdfIn PDF document text
    • http://keramann.ru/uploads/files/fuguxojurarimedudam.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/79052276854.pdfIn PDF document text
    • https://brincandoeaprendendo.com/fotosempresa/files/govivuxumiziropona.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/regemozalidalisejeruse.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613129edc73be---3641889549.pdfIn PDF document text
    • http://warwick-ems.org/userfiles/file/mekodevoxoxupejufinopo.pdfIn PDF document text
    • http://n2nnetworks.com/files/others/37815660919.pdfIn PDF document text
    • https://comillaspostgrado.es/userfiles/file/58321297625.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/72111652652.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/gazalonezarabuxawopuge.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/dtuucquiphslkf0hm5jgkspa3l/75758670661.pdfIn PDF document text
    • http://atomleasing.ru/media/File/nejigegesave.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/77250935153.pdfIn PDF document text
    • http://umrllc.com/userfiles/files/11461711203.pdfIn PDF document text
    • http://madiran-cruduparadis.fr/ckfinder/userfiles/files/rirovajivikoboxafupo.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f15325c152---41256082152.pdfIn PDF document text
    • https://mvmdigital.gr/files/files/38763454618.pdfIn PDF document text
    • https://safewatersolutions.in/ckfinder/userfiles/files/bimisosadozezijadivizope.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613a1046e28db---94323673566.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/i6k3h72sit1brrhrh5nfhv08t3/sezemuwifegolekijidezus.pdfIn PDF document text
    • http://bckbytow.naszbip.pl/img/upload/files/nagumuxera.pdfIn PDF document text
    • 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_off0000d38a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38A 17456 bytes
SHA-256: 2ddd26002d9a7eaae7dde8aa77a50709ec2e0e52b0aa549f2f5697a639765039
font_01_sfnt_off0001009d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118B4 10824 bytes
SHA-256: ec92649e0e9100745497a557d85020b0bc729a8347a1f27abdb340bcb37a83f5

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