Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da5d8a431996c66…

MALICIOUS

PDF

86.1 KB Created: 2021-09-03 19:06:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d5e7161f7c1f3c0e783e438bb78b00fb SHA-1: ad44e776e97e4fa399c2661de90e292ee9275941 SHA-256: 1da5d8a431996c66d6450c6e08bb6e734e903ec7bb9d65b27c3b3219c46d56a1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://theatresaucinema.fr/uploads/file/pegujazoxegizujumol.pdf In PDF document text
    • http://amadpich.com/userfiles/file/16868541501.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/57255308521.pdfIn PDF document text
    • http://beiwendq.com/userfiles/file/54968867062.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799f7069cb2---68562837733.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/76704593924.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/roks5oi942l01p6tgj1q5u3ip5/50133730865.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16112d876a2868.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b0a53d82c---90847438393.pdfIn PDF document text
    • http://pitneyclan.com/clients/c/c7/c7afcfad87c307b096642b2e35f52d25/File/93616114260.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/bf0b23.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/futisetut.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dbc1351018b---lasexajijemikavotelaf.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/da561659d7a4d78d128023b146ff5126/45168326377.pdfIn PDF document text
    • http://zsmnowakowski.pl/userfiles/file/fibazedanokunibiluxukonif.pdfIn PDF document text
    • https://xn--80aaijzh9b.xn--90ae/documents/file/xekozo.pdfIn PDF document text
    • http://stalmost.pl/userfiles/file/88416294447.pdfIn PDF document text
    • https://www.myosiaffiliate.com/199trust/img/file/65885523820.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/19080120826.pdfIn PDF document text
    • http://jaika.in/images/documents/files/zanolijemosuxipej.pdfIn PDF document text
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8fc12890a6---noxibamekadalorute.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/c52e38871468ed314aaa3353ebed0659/96756375011.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/89045051787.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/simagonafovatogasiboterek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=reproduction+in+flowering+plants+worksheet+answersPDF 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_off0000ea19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA19 17680 bytes
SHA-256: 0f7b2e36ebe00f0ab3cf84f43f63a3516a875b8272a017e136aee097c4722e50
font_01_sfnt_off000117dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DD 11220 bytes
SHA-256: 4014bed091d90a6c0fcd95707cfa653b4a9490c3c307fb31f8dbf81bb9f92bd3
font_02_sfnt_off000131f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131F4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1