Malicious PDF — malware analysis report

Static analysis result for SHA-256 d89b6151a484d8e5…

MALICIOUS

PDF

71.4 KB Created: 2021-09-28 11:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3bdad20d01680ca1422df17745e58f14 SHA-1: 5532acf67fd98fa0e0f3da539d40b446dc747d74 SHA-256: d89b6151a484d8e5addbc822ebcbe4a4cd2d263dd9b01d1441330667fd3cac0d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV detection as a phishing trojan. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates the document is a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the presence of numerous embedded URLs points towards an attempt to redirect the user to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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.
  • 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://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130eaa80b677---sedezupesa.pdf
    • http://serenetour.com/image/upload/File/53691151855.pdf
    • https://mahanakhon.pacedev.com/ckupload/files/bagawetepuriba.pdf
    • http://around-sicily.net/userfiles/file/29928609998.pdf
    • http://tianlanlawyer.com/filespath/files/20210925010707.pdf
    • https://safetypadlocks.eu/eurostyl/photos/file/buvejimidasuf.pdf
    • https://tyeetomsfishing.com/userfiles/file/naxajetoris.pdf
    • http://plnjl.com/userfiles/files/66362191243.pdf
    • http://bekescsaba.varosom.hu/userfiles/files/sewavesodugegima.pdf
    • http://studioarchterreni.it/userfiles/files/26456959979.pdf
    • https://solturism.ro/images/file/bizewumejoridobes.pdf
    • http://xn--o39a91gvwm83kbsn.net/FileData/ckfinder/files/20210927_1937BACC24589ED9.pdf
    • https://suksesunited.com/contents/files/musanopigunizazil.pdf
    • http://controlsystemco.com/cache/fck_files/file/rerafigonopefizif.pdf
    • http://celeb.huh.hu/UserFiles/File/26545719856.pdf
    • https://hongdung.vn/ckeditor/images/files/kidaxoluzoxogad.pdf
    • http://sitarofindiamd.com/userfiles/file/48758249749.pdf
    • http://hvezda-pardubice.cz/files/file/fujow.pdf
    • https://www.mppoa.cloudlinesystems.com/assets/ckfinder/userfiles/files/zonurapozexasare.pdf
    • https://ccar.host168.com/data/fckeditor/files/jagavotoxorap.pdf
    • http://miydz.com/mingyi/images/userfiles/file/vanafalusugofaba.pdf
    • https://aznamaste.com/ckfinder/userfiles/files/gisaxevudefa.pdf
    • http://tano-cable.com/d/files/67888204890.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=how+to+add+signature+in+outlook+android
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b220.bin
d07254922ab2a8d0a9aa7474199e0f9975651ab0129eb104431aa28d6613feb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB220 10692 bytes
font_01_sfnt_off0000ca98.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA98 16792 bytes
font_02_sfnt_off0000e2aa.bin
2597d0bf09889cf2b036ea52ca9c9917f8783c4d419a337888b20eb3f3bbb2ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AA 17720 bytes

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