Malicious PDF — malware analysis report

Static analysis result for SHA-256 e394e5811c98a19e…

MALICIOUS

PDF

72.3 KB Created: 2021-09-17 11:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 763c79d26017e26920fe0fcc9f6f42a5 SHA-1: 69f00b1979070c07bd72aed83d08e9f90f53b019 SHA-256: e394e5811c98a19ed135b305f2648efc762d0b45914a30b8495a029d5cd511cc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The presence of URLs like 'https://synerhu.ru/uplcv?utm_term=daedalus+android+wallet' suggests a potential lure related to cryptocurrency wallets, aiming to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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
  • 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.
  • 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://synerhu.ru/uplcv?utm_term=daedalus+android+wallet PDF link annotation
    • http://jdjcnc.com/upfolder/e/files/20210916033832.pdfIn PDF document text
    • http://tuecpa.com/file_media/file_image/file/rikatinajafip.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/lemupaf.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/lemazas.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613258cdc9d54---kikutopinuberarute.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/92136052554.pdfIn PDF document text
    • http://proximeo.com/ckfinder/userfiles/files/87664198476.pdfIn PDF document text
    • http://bighost.vn/uploads/userfiles/file/xoxawobafamada.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/3e92e17dd755ebb49ade305523d621fb/88296823157.pdfIn PDF document text
    • http://www.siposferenc.hu/html/vosigilapozitimor.pdfIn PDF document text
    • http://szkolaprzybranowo.pl/ckfinder/userfiles/files/55863803012.pdfIn PDF document text
    • https://curtain.jinware.com/upload/files/74369099612.pdfIn PDF document text
    • http://cozycornerexpress.com/uploads/files/7440574352.pdfIn PDF document text
    • http://sakulchaiplace.com/Uploads/file/39182401579.pdfIn PDF document text
    • https://rgcsmt.org/ckfinder/userfiles/files/53477362592.pdfIn PDF document text
    • http://alvit-bk.ru/userfiles/file/79192096189.pdfIn PDF document text
    • https://ud-hobby.com/images/Upload/file/jemisufijesuruvep.pdfIn PDF document text
    • http://zeci.nl/im/image/jutuveru.pdfIn PDF document text
    • https://francois-daulte.com/ckfinder/userfiles/files/jowikogilesaweseben.pdfIn PDF document text
    • http://angel-conference.org/upload_fck/file/2021-9-12/20210912015345146997.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/lelugujufow.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/60549158159.pdfIn PDF document text
    • http://drkoopman.nl/cmsimages/file/4169678935.pdfIn PDF document text
    • http://saharun.org/uploads/ckfinder/userfiles/files/24540625483.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141114387075---paropiwibamizoperiwod.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/jepewegas.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_off0000bb6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB6C 15844 bytes
SHA-256: b07d95eda22db34fbb2e0b2212bf88d4839c5cd1cbabb7d2d6f72c1f7e958346
font_01_sfnt_off0000e3b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fbc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC7 10428 bytes
SHA-256: f31286577f3fb9808e97a0e78ab5ddf413f0d9e4b5056236af94a21cf2079d8c

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