Malicious PDF — malware analysis report

Static analysis result for SHA-256 a20e3c8d6c7c0365…

MALICIOUS

PDF

80.8 KB Created: 2021-09-14 02:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 47aa39ca31735fcaaaf12dab9daf50c0 SHA-1: ab19c859c4c4c9f99b53cc1a9b7b89fd07334496 SHA-256: a20e3c8d6c7c03653830a36542dd625eeb94b12598fbcc0c272d3ac97aa1f26c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/b34086c2773f812ffc4b6877c001d042/32121803646.pdf In PDF document text
    • http://psn-monolit.ru/img_file/files/gukodebazipi.pdfIn PDF document text
    • https://nawaasha.org/userfiles/file/kujopopogamaragijitivuz.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/3812899980.pdfIn PDF document text
    • http://hakanhurdacilik.com/userfiles/file/93951142586.pdfIn PDF document text
    • http://ajitcoatings.com/uploads/wosopatidasule.pdfIn PDF document text
    • https://lanhcongnghiepthinhphat.com/upload/files/22230894872.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/24276615270.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/10125388804.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/losaturaguxe.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210914_072050.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/piwajasifojobiduteg.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/xeruzivujokifabupije.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/2090199426.pdfIn PDF document text
    • https://stotex.rs/files/72395661200.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eab8e5e57e---51362239548.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/jemanekoxivikapotabo.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/begorimoniparukuwumir.pdfIn PDF document text
    • https://dveropolis.ru/upload_picture/64648493328.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/76478690163.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/kosuxemasizebefuvelalepib.pdfIn PDF document text
    • https://hobbypet.cz/files/file/sifijevaxomasasomi.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/8b87364314428ecf8fd71eb97c9acb0f/35296742066.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=android+apps+usb+installierenPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d86d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD86D 10608 bytes
SHA-256: 58d5860f325ff7f1f38b0d660a6bfbf2837b6495df7fe46fc463be1ca4c340c9
font_01_sfnt_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 16836 bytes
SHA-256: 2eb3cd9697ec8eb752f2de62991459ef8468e7cf7b361130eb1e676d5ff412ff
font_02_sfnt_off00011c03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C03 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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