Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3790ceac0b38549…

MALICIOUS

PDF

73.1 KB Created: 2021-09-13 04:10:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ff5b939b4aec5b3a7a481824225bf4a5 SHA-1: 6600500938ae1e2e6655b4807e41996a015568fc SHA-256: e3790ceac0b3854988e4adcd3a09ce2aa587c002a046b14d33ba20834714bb85
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The presence of numerous external links, many pointing to disposable domains, suggests a link farm or redirection mechanism designed to obscure the ultimate destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification, likely involving phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.almansori-ye.com/almansorifiles/files/rukikig.pdf In PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/jiduluzuzunotik.pdfIn PDF document text
    • http://bassonconsulting.mc/userfiles/file/xagidazuledunutikuvupezu.pdfIn PDF document text
    • http://www.sospapa24.com/lib/ckfinder/imgupload/files/makikede.pdfIn PDF document text
    • http://biondiairsystem.it/userfiles/files/8390096432.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/86053609275.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/razupapenexuliwajiko.pdfIn PDF document text
    • http://myoffice2561.sesao33.net/UserFiles/File/mafotexewafob.pdfIn PDF document text
    • https://excellencetogether.com/img/files/file/forigutemowimukonapozes.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/75195487497.pdfIn PDF document text
    • http://rszm88.com/upfolder/e/files/20210903032813.pdfIn PDF document text
    • http://donghozibistore.com/luutru/files/10708112579.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/xolad.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/83438265899.pdfIn PDF document text
    • http://unibox.lv/files/text/39520938362.pdfIn PDF document text
    • http://speckletrack.com/update/editor/file/62715778072.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/rujikaniwijasupulifijuxu.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613250be5ea35---lolip.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/44762910180.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2b3292e3e---fawiribesodenul.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/34750085849.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/nupugetolumobukivobomi.pdfIn PDF document text
    • http://www.northern-japan.com/image/upload/File/88490003341.pdfIn PDF document text
    • https://sanagustin.cl/files/serigag.pdfIn PDF document text
    • http://interface-referencement.com/userfiles/file/gererudadewemi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=cbse+class+7+science+textbook+pdfPDF 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_off0000bd38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d54f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54F 10928 bytes
SHA-256: 79cb86cfedcb7af402a842e5ba0cfd97d744e478137f886e3e7e2b268d7263eb
font_02_sfnt_off0000eea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA0 15776 bytes
SHA-256: 3e17d841ea9abeeb990d240f5f4862e52e17eaa6f99fd3d40feab26c397cced7