Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fb94dd75bb18330…

MALICIOUS

PDF

75.1 KB Created: 2021-09-10 19:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7767776975621e98bd602113d648f04c SHA-1: cc2a040d98e1ca0a6f74ffa2c55fcf240fcc4e91 SHA-256: 9fb94dd75bb183301d1777987185dd83d0d93f3bd23111b8f9aa788465715948
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV. The PDF contains numerous embedded URLs pointing to a link farm, suggesting a phishing or SEO manipulation scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the link farm indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://eghamatyab.com/basefile/bainbookcom/files/80270455614.pdf In PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/599d7eb715dc76726cf61a19cc0e51e6/tajuzumebijuvabuz.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139d52369d7e---23234997932.pdfIn PDF document text
    • http://www.iuoelocal870.com/kaizen/ckfinder/userfiles/files/zexeke.pdfIn PDF document text
    • http://phutungtdc.com/upload/files/87402316395.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/81521215655.pdfIn PDF document text
    • http://riverla.vn/uploads/userfiles/file/23661820343.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2021941919348086.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/baxetexinoxesiwepu.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/26822807980.pdfIn PDF document text
    • http://unsersohn.com/images/file/sujoxevijebovetozi.pdfIn PDF document text
    • http://hide-bo.com/img/tmp/file/70561112684.pdfIn PDF document text
    • http://www.huescalamagiaenfotos.com/userfiles/files/fakulikebulikizude.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/80136994858.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/53452680561.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/zubaledimadadebapetuma.pdfIn PDF document text
    • http://pallenberg-busreisen.de/uploads/files/bapivebomuselowa.pdfIn PDF document text
    • http://dpsnowodworze.pl/userfiles/file/16155171189.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109102104196664.pdfIn PDF document text
    • https://kominove-centrum.cz/media/files/file/xotenowigab.pdfIn PDF document text
    • http://beccaro.it/userfiles/files/52983988947.pdfIn PDF document text
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/noripudadelovo.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/80213821378.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/46704871026.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=how+do+you+screenshot+on+a+galaxy+note+10PDF 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_off0000c14d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC14D 11124 bytes
SHA-256: 2ee6258569e771dc491308c06f6be238c68d9b9b8b5309db561aecc76fa416b4
font_01_sfnt_off0000db20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB20 16804 bytes
SHA-256: 5599cb06989f0b215870cefb30163d56ace45d60e7c69f882e272b861b90eea4
font_02_sfnt_off00010641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10641 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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