Malicious PDF — malware analysis report

Static analysis result for SHA-256 342c96350a62a236…

MALICIOUS

PDF

70.1 KB Created: 2021-10-01 19:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e993af66db1be056f77e16ee58ebdc6c SHA-1: 20fd58b0180966af07dcfe2cce06e503a10f0c2e SHA-256: 342c96350a62a236fe7f8877e55f8932c01b29017010ed4e6a395a6838ce5a02
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features numerous external URIs, including one pointing to a raw IP address, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://nomylo.ru/uplcv?utm_term=how+to+add+downloaded+subtitles+in+mx+player PDF link annotation
    • http://thy-environment.com/userfiles/files/mobad.pdfIn PDF document text
    • https://www.uflo.edu.ar/ckfinder/archivos/documentos/45321229264.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/referutidufo.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109140506393154.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/r9396rct6an21v3qlnammgo8l3/vasowerojurusom.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/sepewelodonajo.pdfIn PDF document text
    • https://arbormaster.us/uploads/files/zumemekebagowi.pdfIn PDF document text
    • http://filipdegreef.be/uploads/files/68063064135.pdfIn PDF document text
    • http://gurolmumcu.com/userfiles/file/77274517445.pdfIn PDF document text
    • http://studioingtassinari.eu/userfiles/files/99907297497.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/38890398764.pdfIn PDF document text
    • http://kennycojewelry.com/userfiles/files/202109/1632861204.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/delivususodasajomediv.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/bb3a183b29b3694dc487a1814a016157/buzetumi.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1615456dab58e6---refutawi.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1614468d979a6d---99043998.pdfIn PDF document text
    • http://dsfly.com/uploads/files/wesevupifid.pdfIn PDF document text
    • https://www.wemservice.com/ckfinder/userfiles/files/tuxugatowixupujumepipuxok.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/161516efbc7077---65810172825.pdfIn PDF document text
    • http://miroslaws.com/ckfinder/userfiles/files/janejobinixeneninoxuk.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/mezib.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/wuzudi.pdfPDF link annotation
    • http://gekon.net/userfiles/file/pimuve.pdfIn PDF document text
    • http://tipkeo.com/js/ckfinder/userfiles/files/suvibameroxapevilufoki.pdfIn PDF document text
    • http://studiotecnicoligioni.com/userfiles/files/gajufowowomoxawizipedej.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_off0000b3bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBD6 11088 bytes
SHA-256: f26b6bb340b178b472f5ad984101215c760301ecac78a2ff885e070502a74b02
font_02_sfnt_off0000e574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE574 14708 bytes
SHA-256: e9a63ad052c0d3d9c8a7e4c4f3b851df3464f74a9dffd723c64c2372d8e06d87

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