Malicious PDF — malware analysis report

Static analysis result for SHA-256 8daf3924b0372674…

MALICIOUS

PDF

73.3 KB Created: 2021-09-09 16:24:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f7a754c50e0620b2482807499621d10a SHA-1: 1f6dd977663233ed0c9715aabfd6390c459e200d SHA-256: 8daf3924b03726745d866d801539105f7762ba111b8489a8dfe98a4e322f9a94
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit users by directing them to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://indiantiffin4me.com/nbloom/fckuploads/file/tiditumesa.pdf In PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kijigujewun.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/gimobojulusokitamila.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/27200773562.pdfIn PDF document text
    • http://lexxyin.net/files/fckeditor/file/labisesinajikiruzegonup.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/vijonuruwetozapidisufiva.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/potodojapukelev.pdfIn PDF document text
    • https://infypos.com/infyposcms/media/rovuwex.pdfIn PDF document text
    • https://flomogroup.com/upload/files/39911966119.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/tesufilekosumivupeluka.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fde3df7f3---45553092768.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131ba6bd16c5---zarowiliwarenegamozavaxu.pdfIn PDF document text
    • http://alwaysshine.com/fileimage/file/43170411056.pdfIn PDF document text
    • http://easyhypermarket.com/userfiles/file/15367783083.pdfIn PDF document text
    • https://cncunse.com/d/files/volibazuguveratunotudoza.pdfIn PDF document text
    • https://maribon.net/app/webroot/files/userfiles/files/rowawatilixanovoruwasitux.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/javobivaregujugurepine.pdfIn PDF document text
    • http://turnwealthy.com/ckfinder/userfiles/files/75002787334.pdfIn PDF document text
    • http://malovanesklomh.cz/images/file/32495699076.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/73381859840.pdfIn PDF document text
    • http://armanetti.com/images/juxakilefebilidutemibiw.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16139a2ce12ba2---86897506118.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/vezumuroporejabevanurud.pdfIn PDF document text
    • http://jar-ted.pl/file/79328101020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=malayalam+dj+songs+2020PDF 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_off0000b875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB875 10648 bytes
SHA-256: e028e3af8cd5f933eafd70301188ff23c3442903377181f377f53c83a420af4b
font_01_sfnt_off0000d0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 19100 bytes
SHA-256: da9b5eb8dba1783380bd62f1489521b35923e8873e56da64310a84200edbcdab

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