Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaaaae506853e243…

MALICIOUS

PDF

78.8 KB Created: 2021-09-14 10:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 61813eb3daaaae3e1691d33193856801 SHA-1: a8fbfae71e690b6b540360b464d42ec020c78246 SHA-256: eaaaae506853e243caeb55c8a7fa5d3328ec71b77ff9243c0302a19c8589d6f5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites, which are presented as a link farm, a common tactic for SEO manipulation or hosting further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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 http://drivescuolaguida.it/userfiles/files/tuben.pdf In PDF document text
    • https://dafelia.com/files/jumole.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/28546865620.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/b6e87e284f13cd88bc6a1b1098e29eed/76163956059.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/dovadutigafavelaz.pdfIn PDF document text
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/subikemoj.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109030306274164.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/jobenotodugaramevaluje.pdfIn PDF document text
    • http://grafitym.kz/files/file/votefamademejatopakage.pdfIn PDF document text
    • http://gilendor.cz/userfiles/file/14401040654.pdfIn PDF document text
    • http://terwaarde.be/ckfinder/userfiles/files/14502679127.pdfIn PDF document text
    • https://manage4.realtourvision.com/rtv/ckfinder/userfiles/images/files/negizolupalizem.pdfIn PDF document text
    • https://maviet.vn/upload/files/napel.pdfIn PDF document text
    • http://strap.sk/uploads/files/vusafunurakukorakud.pdfIn PDF document text
    • http://mrhobbscoffee.com/images/uploads/file/murinafasa.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/74061646274.pdfIn PDF document text
    • http://monthclean.com/uploads/files/202109101550229608.pdfIn PDF document text
    • http://studiotecnicopetrillo.eu/userfiles/files/zunawe.pdfIn PDF document text
    • https://tjp2-hotlink-j3t.com/contents/files/gawuvarerikinito.pdfIn PDF document text
    • http://area100impianti.it/userfiles/files/zibugurofonemotuzalu.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/dedanasutasusurugemenexo.pdfIn PDF document text
    • https://kildevangen.dk/files/ligonoxigiv.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c8207ad942---25841061036.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/tivitedu.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e0d0441a8c---vopefekizamubevawaxa.pdfIn PDF document text
    • https://gedayapi.com/userfiles/file/namiked.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/30110724684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=convert+youtube+video+to+mp3+android+appPDF 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_off0000cff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFF3 16956 bytes
SHA-256: d31238dbe83038e80ddba5bd019d52943d19bb78dd53f71acf7ac93a81d61ec9
font_01_sfnt_off0000fba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B9 10964 bytes
SHA-256: c59496110dbf1c5a5154b12cb6d0e8970522fab3fda8d1958a6795afc7fc6834

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