Malicious PDF — malware analysis report

Static analysis result for SHA-256 69f1ff5ed3ee8abb…

MALICIOUS

PDF

92.9 KB Created: 2021-09-02 09:01:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0825f2988105046d6ce2574efd3dfbd3 SHA-1: 40404f52a48079204463d892d04aa61d0e992583 SHA-256: 69f1ff5ed3ee8abb6ec44cc4c9587a52a8419867a0ff190943089e9343ab04b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • 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://inwebjor.ru/uplcv?utm_term=tedros+of+camelot PDF link annotation
    • http://husplaza.hu/editor_up/laxopu.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/0e068603f39844e8c9ba465f6c41826f/66308162069.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/1a9lchmnk29co462jo4kck7h66/vakogetok.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/cc008284ccb47bc9f37269d2d0b50d0f/wejurasawisosojosabejot.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160d3f4f287cea---81356334819.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/8e315230f51064de1493aea330654946/bodurupowexunarokezema.pdfIn PDF document text
    • http://ninda.vn/userfiles/files/fozisabizuberogimit.pdfIn PDF document text
    • http://bahattinburyan.com/userfiles/file/90494412657.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/nisv7sl2s2m8igo8e5q7b58gu5/momusadip.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/65648348430.pdfIn PDF document text
    • http://dogoducthien.com/uploads/files/mimegojewemumabalo.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/88487752360.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607c45b99166b---63178379214.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610035364cba5---wojesirurabiwa.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c8bd1227db7---jusidasuvanovilexepar.pdfIn PDF document text
    • http://kiuanai.com/userfiles/file/95323642234.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/jazemelerir.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/4vquatqdva5k4ooptasap9dqcc/53710002893.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/risegexuxakuva.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/wutadisog.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160872b8bd74a5---28999647685.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/mupojirolivifejesuz.pdfIn PDF document text
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/fikagozepelodekoran.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_off0001076d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1076D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011f84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F84 10404 bytes
SHA-256: 9626521b5471014a425d66de2b8cd5ae3d5fc8f43f023208c2d97455e87f71bf
font_02_sfnt_off00013720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13720 18020 bytes
SHA-256: 7f00b6fd8c7557da21a8cc3289db000c26564c1c0d42aafefaf6dc25ebf74163