Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83cbe44e2187a02…

MALICIOUS

PDF

71.1 KB Created: 2021-09-29 05:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 35bd53b452ee231a7487c9fb8b792344 SHA-1: fa2f0dea4fce84836c61772d4cbc7b773e958b4d SHA-256: e83cbe44e2187a02d2d97a91c8b0a424c993ae3aa3134c369e2087d48d3dcfb0
126 Risk Score

Malware Insights

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

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many pointing to disposable domains, and is flagged as a link farm. The primary purpose appears to be directing users to a collection of PDFs hosted on potentially malicious or SEO-manipulating infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://alrabbancapital.com/file/files/27316845971.pdf In PDF document text
    • http://chanhungcorp.com/images/uploads/files/4978643948.pdfIn PDF document text
    • http://cocoal.com/uploads/file/konodof.pdfIn PDF document text
    • http://minuspk.ru/minuspk.ru/userfiles/file/lotiru.pdfIn PDF document text
    • http://cftckr.marketsearching.com/upload/files/26202257028.pdfIn PDF document text
    • http://alrehabourhome.com/userfiles/files/pakamibulimigesupufiwil.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/77421955473.pdfIn PDF document text
    • https://jasmijnbloemengroen.nl/userfiles/file/siwakiwowuxuvo.pdfIn PDF document text
    • http://xn----7sbicwad4afgcgd5aph7d5e.xn--p1ai/ckfinder/userfiles/files/50446880344.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/58850064011.pdfIn PDF document text
    • https://ural-aiti.ru/admin/ckfinder/userfiles/files/80847718195.pdfIn PDF document text
    • https://slavyansk.biz/userfiles/file/jupupim.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16150f460df487---13242533082.pdfIn PDF document text
    • https://goodline.by/userfiles/file/funexagabiruwozezax.pdfIn PDF document text
    • https://ekoelprom.pl/public/images/editor/file/zukotezowugodenosavefil.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210908121542579.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/punibolituv.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/992cd904d3d8d290afcf5ce276cc6f53/50442721314.pdfIn PDF document text
    • https://jvlegacyhomerepairsmd.com/nbloom/fckuploads/file/gemakawavapodusadesuxu.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/11832047602.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/69240341695.pdfIn PDF document text
    • http://citty.org/images/uploads/file/gunikitupomunix.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/dutamedomel.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/jinugirisov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=games+similar+to+age+of+empires+on+androidPDF 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_off0000b01b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB01B 10880 bytes
SHA-256: 6662b9206c3c22c3b7926c0e7335b5d75aa66ac233e576d8146230ca18d536e1
font_01_sfnt_off0000c90a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90A 17644 bytes
SHA-256: 57c510a470490c84f59a3d6cc8439c425b2b71659583b4af0cbffe2badcaf654
font_02_sfnt_off0000f676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.