Malicious PDF — malware analysis report

Static analysis result for SHA-256 2deeb59a817095fe…

MALICIOUS

PDF

79.4 KB Created: 2021-09-01 06:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 50978e0eff69d7227c87daafe3a6f4cc SHA-1: 44d47eb8d10e54f342b54274d91107afb4714cb8 SHA-256: 2deeb59a817095fe2377e32563b9700d3fe77cc3d41cc2bd22d15a0f83a79424
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or malware distribution attempt. It contains numerous external URIs and link farm heuristics, suggesting it directs users to compromised or disposable hosting sites. The document body was unreadable, but the presence of multiple external links and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly suggest the intent is to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://huntic.ru/uplcv?utm_term=photo+video+maker+with+music+app+download+for+pc PDF link annotation
    • https://autotoner123.com/home/autotone/public_html/ckeditortest_WORKING/ckfinder/userfiles/files/gijekizejaworuvob.pdfIn PDF document text
    • http://donghotam.com/luutru/files/lofojakogikawefisul.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071870b87e1f---37373310594.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/26269544569.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/vjori1m3bnm7h1h24032ccesls/32491499617.pdfIn PDF document text
    • http://flavourit.com/uploads/userfiles/file/file/biloxuvegezorufafudajuta.pdfIn PDF document text
    • http://miracleschoolministries.com/survey/userfiles/files/libutofezoteganajulijaru.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/oo6sopomp27blsm1mdq5qtil95/60351279628.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/xugoxasowovari.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d33a27d9b---8999554314.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/reruxozirolafu.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/c1a57bf02e110e326ca1289a7e6c537d/30656450521.pdfIn PDF document text
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/xuxoburujunutola.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/18954756130.pdfIn PDF document text
    • http://gilbertthomasreunion.com/clients/5/5f/5f56fe696be94dde62972871c8a9bc28/File/60213409474.pdfIn PDF document text
    • http://studiomarazzi.eu/userfiles/files/jutobibizone.pdfIn PDF document text
    • http://dayou.tw/uploadpic/files/202108261830128597.pdfIn PDF document text
    • http://888chji.com/userfiles/files/duzogilujagefazunuxikiwa.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/96798780816.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/gagamiz.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbcb4c4f09---petopeverol.pdfIn PDF document text
    • https://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/29678065635.pdfIn PDF document text
    • http://toptoptraining.ru/img/upload/file/16358641697.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/60250617923.pdfIn PDF document text
    • 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_off0000cfc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFC9 17424 bytes
SHA-256: fe7840f448bacd72b7fbcc54841dac1f43c32eec30c7ca3b363e097a0154eaeb
font_01_sfnt_off0000fca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA7 11232 bytes
SHA-256: 6a465335e3307fa2a84ace500d2d7d582b5247a95183b85c7575dc6ed9c9dce9
font_02_sfnt_off000116e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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