Malicious PDF — malware analysis report

Static analysis result for SHA-256 470beac96b8c9651…

MALICIOUS

PDF

71.6 KB Created: 2021-10-03 12:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 4253bf8a6ef672e8c8b939c5fa2e5d8a SHA-1: 0132fc2f9633c0d8a5d584f3af0193f64100577f SHA-256: 470beac96b8c9651252a584b8aa925eaa9925ff8a12a4d6fcd12f085489395f1
164 Risk Score

Malware Insights

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

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features a link farm pointing to multiple distinct hosts, some of which are identified as compromised WordPress upload storage. This suggests the PDF is designed to lure users to external sites, likely for phishing or to download further malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

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://hkalc.com/userfiles/97626102267.pdf In PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/e553b74b1cb345eddf9a7955ec48302e/lobadod.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/nemomumexekiverunufe.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/naliwabela.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/kepagevukuzifunumijowedas.pdfIn PDF document text
    • https://bookmyexcellence.com/bookmyexcellence/js/ckfinder/userfiles/files/jigelanedikevixipig.pdfIn PDF document text
    • https://eledigitalpr.it/allegati/file/biwutusokometerawesini.pdfIn PDF document text
    • http://annabarons.com/files/files/poxokifiwamotokobomo.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc6913bc5d---36205852517.pdfIn PDF document text
    • http://deleersnijder-bocaege.be/images/file/95947745978.pdfIn PDF document text
    • https://alpinashop.bg/files/33217025893.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133c0c34d213---6246043762.pdfIn PDF document text
    • http://aviteksural.ru/admin/ckfinder/userfiles/files/33021572334.pdfIn PDF document text
    • http://abwhopewell.com/uploads/files/57566542305.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132105fd934f---zorupem.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/wowovivuzu.pdfIn PDF document text
    • https://dwitunggaljaya.com/sitefiles/file/10955279717.pdfIn PDF document text
    • http://rubivina.com/Images_upload/files/62746350659.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/bf714d2692813edb0ce4833303ae5f67/didesimabopevo.pdfIn PDF document text
    • https://www.carnesvarejo.com.br/assets/ckfinder/core/connector/php/uploads/files/4220883816.pdfIn PDF document text
    • http://hasanmasat.com/ckfinder/userfiles/files/62960158773.pdfIn PDF document text
    • http://evolution-dev.com/file_media/file_image/file/50698353016.pdfIn PDF document text
    • http://lachambredechos.com/userfiles/file/jorunetovuvipizu.pdfIn PDF document text
    • http://konberdbio.com/upload/files/tizasexofemonixuba.pdfIn PDF document text
    • https://grupa-energia.pl/attachments/file/89746285667.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1614dc64f8edc9---mopafepiroxilakibule.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=enteric+fever+caused+byPDF 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_off0000b41c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41C 10704 bytes
SHA-256: 3fd9424ecbb58715c9b5836cc765debadab0ca7f6095e63bca5dd585b04c4098
font_01_sfnt_off0000ccda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDA 17004 bytes
SHA-256: cbbdc076b270f5591964e752941fd00b1ab7de08f7c32a42db43f9ed4e36930c
font_02_sfnt_off0000f882.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF882 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.