Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd577c697169680…

MALICIOUS

PDF

88.7 KB Created: 2021-06-30 01:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 91321a12e675cd31f4da0a38f9c3cb5b SHA-1: 73f4c710ec343fb13a05f44007166463a663b438 SHA-256: 9bd577c697169680a5af64259b1c51e1237d2b336870dc94e3f0f5ef64359562
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and link farm heuristics, indicating it's designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The embedded URLs point to compromised WordPress sites, further supporting the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/rimis5lali87cbpllmdpctk1pg/morudotexiba.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a2fc5017d---tozigosu.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/6d7c015d01a23ce43ee75ca3b6766d2e/zinapuxoluzepevo.pdf
    • https://esperanzadeavila.com/fotos/file/43120222998.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085bb45bc3c6---37820508536.pdf
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/45be60e4ad050398395b1411f9706bba/wiwotor.pdf
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/5q7kb2bau5ias6175ld8kfarig/61088562173.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/s6dhc7de46ult1cfihm8f0t4pe/mezabijokux.pdf
    • http://agrobud.net/uploaded/file/jevetajaletimuvavexuju.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608722d71f7ee---28637776620.pdf
    • http://www.contectrade.hu/fckfiles/file/teditu.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/1timnnu2hdij4a50iq6dubjui1/povis.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf908384f94---lufagodanugozus.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/919fa6299c1cb284296290c2b26b0cff/lilafizidufo.pdf
    • https://marljivo.hr/userfiles/file/femuroporelevamaza.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/421ae4774d560d92757d3c55797246b3/17512798649.pdf
    • http://mega.kz/media/upload/files/lulaxut.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/q1qf5obs41tt2lpissvp39dfsh/62252825649.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16090c1ba67e4d---69684285038.pdf
    • http://altelaw.com/uploads/image/file/nerag.pdf
    • http://niengrangchuyensau.com/upload/contentFile/file/37684451669.pdf
    • https://paperland.bg/uploads/file/pefobevaxapefixa.pdf
    • http://ongnuocdenhat.com/upload/files/zejipenoxugubumuvolamekux.pdf
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/a2d6b8711508951f594f63d0b6a69ab2/vafotejid.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=small+dog+playgroups+near+me
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f8ee.bin
f64b1a02aaf295c23abdca015cf2b9e4e83cda4d947bb88b7c316505311387c5
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EE 16796 bytes
font_01_sfnt_off000124c4.bin
4b01b18d14da6262fc4b5d71ae3de2fff7b6ab7849a85b37f2ebd4ba16644e1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x124C4 10836 bytes
font_02_sfnt_off00013d88.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13D88 16792 bytes