Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea768a1196d487d7…

MALICIOUS

PDF

69.0 KB Created: 2021-09-26 02:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: c723162111c9782b883abc47095b8882 SHA-1: 91463364ebde2e82083469cf65d7e15c61a0abe1 SHA-256: ea768a1196d487d7b5c267a6b304a1eb9679f14ec81e0a940949c10d655c5e96
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic suggests it functions as a link farm, directing users to numerous distinct, potentially disposable domains. The presence of many unknown URLs supports this, indicating a likely phishing or malware distribution scheme.

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 http://realestatespoznan.com/uploads/vubemerafulamanu.pdf In PDF document text
    • https://dailyiat.com/html_upload/file/rabisa.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/697fdc60c6920419df2f1aa01952d0dd/nirarulobujenur.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/23215456781.pdfIn PDF document text
    • https://adminico.nl/userfiles/file/36340799588.pdfIn PDF document text
    • http://ulv-fogger.ru/d/files/pubosujozefo.pdfIn PDF document text
    • http://www.giuseppe.ru/ckfinder/userfiles/files/moninibitupoxozifuvolo.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210910_8E759723F8922BE0.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/tapudajol.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/b72b2d4326fd5a29fb612d7e1e9c69b3/32642992591.pdfIn PDF document text
    • https://mimpiindahsatu.com/contents/files/bikime.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/katuvelologinoxotinir.pdfIn PDF document text
    • http://badaranquehablar.com/userfiles/files/buxumuvagomapejemuvugato.pdfIn PDF document text
    • http://exms.fr/sites/default/files/file/19234034759.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/pumibobemuwitekipegada.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tomokabed.pdfIn PDF document text
    • http://cartopack.be/Images/file/22521450244.pdfIn PDF document text
    • https://basalyemek.com/ckfinder/userfiles/files/83834408096.pdfIn PDF document text
    • https://big-affaires.com/img/pics/files/tuforigunizowe.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/dutaliwuvufupulif.pdfIn PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/45787244026.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=airdrop+android+iphonePDF 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_off0000ae22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE22 16780 bytes
SHA-256: 5198f4bdeb744a737ffc8622e59d1579df98dd60d1dbc7bb422abb08c0f5ee3c
font_01_sfnt_off0000d884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD884 10160 bytes
SHA-256: 78be41ab34f1338947e0e689b1775c8179d5cf9a664aebaddaef1d402475620d
font_02_sfnt_off0000ef11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF11 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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