Malicious PDF — malware analysis report

Static analysis result for SHA-256 eae6ab0da4777bfa…

MALICIOUS

PDF

91.6 KB Created: 2021-10-13 11:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: da4f77a8cfaec45842e785689f437826 SHA-1: 332bd8418f4adc55837ea718c8bc20c00c0f77cd SHA-256: eae6ab0da4777bfa7f80e0d64f96c353a446834d6cb653401bdad9c4850a2058
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it functions as a link farm. It contains numerous embedded URLs pointing to other PDF files, suggesting a phishing or malware distribution scheme. The presence of many distinct domains and the use of UTM parameters in some URLs further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://telecycling.info/files/file/41235469819.pdf In PDF document text
    • http://influences-vegetales.eu/assets/Image/files/11716633729.pdfIn PDF document text
    • https://searchlink.org/userfiles/file/49113204852.pdfIn PDF document text
    • http://erfanekeshmiri.ir/userfiles/file/meralafejizewolajenuxido.pdfIn PDF document text
    • http://akbarestate.com/survey/userfiles/files/bonidenaj.pdfIn PDF document text
    • https://sikahaiphong.com/images/news/files/lapoged.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/texomela.pdfIn PDF document text
    • https://officialbacknumber.org/editor_up/54614008490.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/23123558586.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/93736145568.pdfIn PDF document text
    • http://way-of-spirit.ru/upload/file/tazuxotixul.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/situxej.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/70937389986.pdfIn PDF document text
    • https://marljivo.hr/userfiles/file/kelozipibanajanav.pdfIn PDF document text
    • http://charolais-hessen.de/write/userfiles/file/20248351822.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/43553957986.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/todinudat.pdfIn PDF document text
    • http://ziconiavip.com/uploadfck/file/98022314038.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/xedolaxegosenolunar.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/80197621066.pdfIn PDF document text
    • http://uleshuzatshop.hu/files/file/17376461175.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134da505185d---9501115467.pdfIn PDF document text
    • http://5mal4.de/moneyvidya/web/images/userfiles/file/90243619065.pdfIn PDF document text
    • http://aimic.com/userfiles/file/kakuxobuletinofid.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/xPAns0MRe5M/uplcv?utm_term=travis+young+thugPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE368 10452 bytes
SHA-256: e3011333b1fac4e276840d4ef6e464d736ac16b062b29be608c8b9763b245f84
font_01_sfnt_off0000fb21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB21 16168 bytes
SHA-256: 6cba6677bde0f241d5abe4bd1daabf497e221bd6197b657de4268e87bbbbfee9
font_02_sfnt_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 21696 bytes
SHA-256: 280e7f941881ca88199fa329374fd4cd6ac987b3a460b5477625b6cdd7727779
font_03_sfnt_off000148f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x148F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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