Malicious PDF — malware analysis report

Static analysis result for SHA-256 faeff2ec1bd6c911…

MALICIOUS

PDF

77.8 KB Created: 2021-09-20 18:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 153b65e69762bc2d828ed214f772294c SHA-1: 71c41e50dbf1126affa9998374b05496fa907308 SHA-256: faeff2ec1bd6c911378bd297ee96838780b7d50ce90255aaf8ed28913d199156
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, with a high concentration of links pointing to disposable domains, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://serbanindustrialconstruct.ro/uploads/files/gukiwulurafaviluxexed.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161349d775d151---vigetogutoresina.pdf
    • https://4of100churchstreet.com/assets/media/files/depudadotopuxuwupuxe.pdf
    • http://haiphongcontest.com/images/files/40219829137.pdf
    • http://hoteldanang.com/uploads/images/files/97253583501.pdf
    • http://thekitchendesignstudio.org/uploads/files/fuzukelagasodolilazigiroj.pdf
    • http://kelkenaghshband.com/app/webroot/img/files/zekelite.pdf
    • http://packagingandfoodmachinary.com/userfiles/file/jolinilaf.pdf
    • https://hankilfood.com/userfiles/file/20210911091906.pdf
    • https://vinacomvietnam.vn/uploads/news_file/10759746822.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16148876eb18ff---fiziteg.pdf
    • http://lifeline-sports.com/files/file/4275841963.pdf
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/legodoremulifuxepa.pdf
    • http://fullx.net/files/72161157567.pdf
    • http://clairvoyantinfotech.com/demo/images/jasajev.pdf
    • https://sowlindia.com/userfiles/file/65432722013.pdf
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/toxedaxom.pdf
    • http://iuf.kr/pds_down/files/zumifuwipujepuxaminotunag.pdf
    • https://hoavily.com/uploads/files/74630068696.pdf
    • http://gddfboiler.com/uploads/files/fewuzixadigema.pdf
    • https://yuvasarkar.org/userfiles/file/45440333642.pdf
    • https://pastijptoto.com/contents/files/pegirufimedobejifuwuvop.pdf
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/89224507303.pdf
    • http://www.swaving-stalinrichting.nl/ckfinder/userfiles/files/36785720198.pdf
    • https://jairdefreitas.com/ckfinder/userfiles/files/renijinizemepixuposuwuke.pdf
    • https://ecosolar-energy.com/piceditor/file/gesifiwikamiwomefuzuxes.pdf
    • http://smepil.com/ckeditor/userfiles/files/88507917021.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=messages+are+not+sending+on+iphone
    • 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_off0000ccfa.bin
241433eba7b9ca468a108203e8f1501bb3caeb7002af2237bcd4233ce7d68a5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCFA 17100 bytes
font_01_sfnt_off0000f96b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF96B 16792 bytes
font_02_sfnt_off00011182.bin
8a743897cedd0b5a7f5b2730ada79ed02603b48e045ce93776d136424af53fa6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11182 10616 bytes

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