Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b2ba9f41d50a71…

MALICIOUS

PDF

81.6 KB Created: 2021-09-09 01:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49bede213438b95873560248828b25db SHA-1: 1d757d1e6536c66c386829282c1cf0e3cfe6b32c SHA-256: 54b2ba9f41d50a7137f52767cdb1ae9561406cddff9fc678337828513f1970b1
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external links, many pointing to disposable domains, strongly suggests a link farm designed to redirect users. While no scripts were explicitly extracted, the PDF structure and link farm heuristic indicate a malicious intent to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://kosmonautika.ee/ckfinder/userfiles/files/vegakutore.pdf
    • https://lrdreamteam.com/files/files/file/InfoProduct/file/ligerafimuto.pdf
    • http://www.rannatennis.ee/data/upfiles/files/mokegezomurelodumifare.pdf
    • https://bawauang.com/contents/files/xejibetidamewiwipuvale.pdf
    • http://cnzgks.com/userfiles/file///16042371317.pdf
    • http://quanhoangtsi.com/upload/quangtri/files/javaras.pdf
    • http://triple-a.co.th/ckfinder/userfiles/files/wirip.pdf
    • https://proektasis.gr/admin/spaw2/uploads/files/sukizijanujezosuxawo.pdf
    • http://presssimayeshahr.ir/pic/file/renig.pdf
    • http://neuchina.org/userfiles/file/93606785786.pdf
    • https://konzolstudio.ro/uploaded_files/file/soxuxaxoxejuvazijeko.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/22e18fb37f3cde2d2302b44a5ba477cb/mapoxekovutimo.pdf
    • http://winecellarkeeper.com/ckfinder/userfiles/files/pewununekerilunutameli.pdf
    • http://adamlegal.com/userfiles/file/vemapijozawuzabemiga.pdf
    • http://newtarrytowndeli.com/uploads/files/44221431085.pdf
    • https://totspotdaynursery.co.uk/ckfinder/userfiles/files/mojupag.pdf
    • http://oryginalnedekoracje.pl/userfiles/file/bisaj.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/78276285958.pdf
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/de488d2e49c2e79562d272c8306cdb42/bulasafibawuwiposusafe.pdf
    • https://pgp-puh.hr/fck_media/file/janoxurawovevoneligejix.pdf
    • http://shepardinteriordesign.com/rw/upload/file/70964845535.pdf
    • http://jmyhship.com/uploadfile/files/97396211567.pdf
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/gisorujetedikigajozaviwok.pdf
    • http://speednewslive24.com/assets/ckfinder/core/connector/php/uploads/files/84438397892.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=rank+cheat+ml
    • http://crossfit28.com.s125853.gridserver.com/siteuploads/editorimg/file/17446611638.pdf
    • 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_off0000dce0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE0 16792 bytes
font_01_sfnt_off0000f4f7.bin
8281c2cc9b1264baad0c10b20980689b3ac4bf87da09526e4340aa494ea30fb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F7 10152 bytes
font_02_sfnt_off00010b78.bin
c3ac0e46000ff0d7b733c8bdb2ba30a96df8cd80db4d08ee760990c6e086233c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 17760 bytes

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