Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeaedaff8d25ec21…

MALICIOUS

PDF

86.1 KB Created: 2021-09-19 02:24:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 64b4dbfe95d8dc3a9b35bb7b9592e6cb SHA-1: 66889f5fb3eb867b42270fd683bce07d8eafce34 SHA-256: eeaedaff8d25ec21f50d9de10dbf0854690acba007722688e0e0a73e2ba0da5f
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and multiple external URIs, including one that mimics a search result for a common user query. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to malicious sites, potentially for phishing or further malware delivery, aligning with T1059.007. The presence of external links to compromised CMS uploads and link farms suggests an attempt to host or distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://drafthe.ru/uplcv?utm_term=how+to+stop+pop+ups+on+android+phone PDF link annotation
    • https://codecs.ro/images/file/xuxijoduxemetejogujamow.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/91519337590.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/g4q6sqigi2q84qi8llfsqq18b0/65903141955.pdfIn PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/borinunofakikepiwigudur.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613add091be7b---supidekajufexuxaxeler.pdfIn PDF document text
    • https://www.zochrot.org/ckfinder/userfiles/files/51557529073.pdfIn PDF document text
    • http://immobilieninvestors.eu/userfiles/file/12054663888.pdfIn PDF document text
    • http://bibliotekaszamocin.pl/img/upload/files/laredojudoniseguxabij.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/fuwikefakukapegepurak.pdfIn PDF document text
    • https://textmakareknutsson.se/upload/image/fopevesu.pdfIn PDF document text
    • http://regalmotors-jp.com/js/upload/files/dadasorimagibate.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/kia4cra6c5hd9p13rdrnvf96gl/pofexisosanusojevema.pdfIn PDF document text
    • https://www.babetravelling.com/ckfinder/userfiles2/files/gogopupijav.pdfIn PDF document text
    • http://itexpertdog.nwoasis.com/upload/files/63844493935.pdfIn PDF document text
    • http://dynamicyunnan.com/ckfinder/userfiles/files/matuvanotewuxujaveriva.pdfIn PDF document text
    • http://wdnederland.nl/file/20061656745.pdfIn PDF document text
    • http://aallergy.friend-match.com/upload/files/82968839328.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/nilejame.pdfIn PDF document text
    • https://www.auto-ecole-acm.com/ckfinder/userfiles/files/pajopozujizigazidovosu.pdfIn PDF document text
    • https://khyatiinfotech.biz/ckfinder/userfiles/files/ribuwipimajad.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/41753303794.pdfIn PDF document text
    • https://poganyvolgyi.hu/userfiles/file/5333219943.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_off0000e8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CA 18920 bytes
SHA-256: 6c4e83215ca49092c58279f6b02dfc3e22dd63f156ad24ac53c1400c1cfe2803
font_01_sfnt_off00011a37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A37 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001324e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1324E 10620 bytes
SHA-256: 311a5b61034aa0ea0546bc111983734deae05afb6a916462e777070a07bd7363

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