Malicious PDF — malware analysis report

Static analysis result for SHA-256 9803536a46febf2a…

MALICIOUS

PDF

85.5 KB Created: 2021-09-20 03:46:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e5ad3c6554e8c17fa962523a6dd86550 SHA-1: f8a972982a27273b4a4880795ca4bf5ecf3bf9a0 SHA-256: 9803536a46febf2a10988abb52fb985e596734466956208a7d69e5a08316c85e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It functions as a link farm, containing numerous external URIs pointing to potentially malicious websites. The presence of embedded URLs and the 'link farm' heuristic suggest an attempt to redirect users to phishing or malware hosting sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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 https://philabc.ru/uplcv?utm_term=how+to+connect+mi+earbuds+to+android+phone PDF link annotation
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/832a52ead9e18d0319f49885a1c560a0/27657992135.pdfIn PDF document text
    • http://commissioncollectionlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pipobujosugerigefese.pdfIn PDF document text
    • https://rimi.sk/userfiles/file/ravoxagozanedigukopozodub.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/3181137923.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/44024468859.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/kaguwigemuvowezutud.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/19995198612.pdfIn PDF document text
    • http://1yunnan.com/ckfinder/userfiles/files/72267715727.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/161404d04d6d05---98562254233.pdfIn PDF document text
    • http://ilsungwarehouse.com/userData/ebizro_board/file/72454462934.pdfIn PDF document text
    • https://abbma.in/admin/uploads/file/86220989978.pdfIn PDF document text
    • https://mimpidia.com/contents/files/34035402719.pdfIn PDF document text
    • http://www.aamuhsv-madisonalumni.org/files/files/naxenuze.pdfIn PDF document text
    • https://curvy.tw/upload/files/9079979407.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/madokikafowi.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/tidewuxov.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/nunulikaseditojovujaxa.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/sesejaxi.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/35275078157.pdfIn PDF document text
    • http://exosushi.com/uploads/files/2438544943.pdfIn PDF document text
    • http://www.polni.si/Images/files/63330037341.pdfIn PDF document text
    • http://tbeaindia.com/userfiles/file/42782343331.pdfIn PDF document text
    • http://smirna.pl/files/file/49611738041.pdfIn PDF document text
    • http://khonggianmang.com/upload/files/bawubutoxegesomo.pdfIn PDF document text
    • https://ienter.bg/files/52444940131.pdfIn PDF document text
    • http://helenhotel.vn/upload/files/nijalolodu.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_off0000e866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10078 17832 bytes
SHA-256: eebf3cc06f36f47db63929ed3d5e358da605817afecafd025ab3dc7bd31aa921
font_02_sfnt_off00012f04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F04 11048 bytes
SHA-256: cf820a97fcfee9532cf26095b425080c0b5053b1305e88ec1da450c41c1cf647