Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c55abf9cd50540a…

MALICIOUS

PDF

119.0 KB Created: 2021-09-07 03:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2293e130984a30710a98fc2f28f67887 SHA-1: 817ea092d7e5ae5880b4ac0a60edc80bf60a1107 SHA-256: 7c55abf9cd50540a257eed552182e9473f36485cd3390863c89aa17e26707215
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=marin+marais+les+folies+d%27espagne+pdf PDF link annotation
    • http://oumkua.com/userfiles/file/silebegakagelelojo.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/zodijajajijavifod.pdfIn PDF document text
    • https://tosto.cl/ckfinder/userfiles/files/tinovozojufijonuva.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/wiralitugasovebekixolojip.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cfcc6e4bc61---38207486328.pdfIn PDF document text
    • https://mmagame.com/userfiles/file/zupelivatuzoj.pdfIn PDF document text
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/82851327718.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/484b5894ccc1f3853873fc59e4e4906d/94866862293.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/20504394179.pdfPDF link annotation
    • http://luckdidea.com/ckfinder/images_store/files/49710677484.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/dosugorodofigagezemi.pdfIn PDF document text
    • http://tele-fonika.pl/upload/file/21944411187.pdfIn PDF document text
    • https://thaiahpa.com/flash/files/kurinifasejasilunijexu.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/d440ef7248cbbd7a401612589810dacb/defonewepadowux.pdfIn PDF document text
    • http://hyundainhapkhau.net/upload/files/sukel.pdfIn PDF document text
    • http://knowleangling.co.uk/ckfinder/userfiles/files/gijotebigapatare.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/85a1d2fada9c39348484ec5f0db26192/58838104684.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/5c5c647f3132e2da527b4db55be420cc/fafesunomotugutotud.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/991e868c1413609047b8db32ed919eaa/44413710891.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed8b070d9c---wodubagasaxibimiluzewoku.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1c4f77bdc---xexixogakatutanu.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/talaxowireruxoviligukixi.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/9gjatd772f1q9mrn1rhaan1ld6/10258912979.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001492a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1492A 24920 bytes
SHA-256: 06cf07824cf35220d7270c8336d928b787458f38b46a75d39185e891ec00476c
font_01_sfnt_off00018741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18741 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19F52 16160 bytes
SHA-256: fa5cbea137587b1d4bb1c548ff3f8d17a18587fe273de630a8d80f12e69f99e4
font_03_sfnt_off0001b4ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4EE 10768 bytes
SHA-256: 55eea8c31f583a73fe04bb2ab8905dac331ffbbd9e24dbda73ef1f81abb84204

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