Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32ed2d0d2285074…

MALICIOUS

PDF

87.5 KB Created: 2021-03-27 11:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 664bd1f1a19cfa94f79ffff6cdfae97a SHA-1: e87c835bfb71c8cb4c59b50a0481543a99fcb55e SHA-256: d32ed2d0d22850743716ddec04f3dc79e2675941f4d0c0b09d1dcb6cd5ce7f2c
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 ClamAV and an ML classifier, with heuristics indicating it functions as a link farm containing numerous external URLs. The primary purpose appears to be directing users to other PDF documents hosted on various domains, potentially for SEO manipulation or to distribute further malicious content. The presence of multiple external URIs and the 'PDF_SEO_LINK_FARM' heuristic strongly suggest this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/award?keyword=defensa+siciliana+variante+dragon+pdf
    • http://futup.ru/tasugon0uxmz.pdf
    • http://ing-cliente.com/guzixeueou2.pdf
    • http://design-kvartira.info/367031586306w727.pdf
    • http://accueilcmb.com/sih_problem_statement_formatxyw0m.pdf
    • https://lasomuvexovip.weebly.com/uploads/1/3/0/8/130813571/822269.pdf
    • https://xefezabegeritaj.weebly.com/uploads/1/3/1/3/131379478/ebaffa7c1c.pdf
    • http://slmit.space/36268097949xphh3.pdf
    • https://cdn.sqhk.co/sakixowofeg/ZhbwPaD/best_love_ringtones_2018_download.pdf
    • https://vezikiga.weebly.com/uploads/1/3/0/7/130739663/4881118.pdf
    • https://bevugatumuga.weebly.com/uploads/1/3/4/3/134316863/tewuxonuz.pdf
    • https://xadebunurag.weebly.com/uploads/1/3/1/4/131454816/xogusamo-luwaji-murimojamelam-legoxowode.pdf
    • https://kovuvewu.weebly.com/uploads/1/3/2/6/132695697/4119476.pdf
    • http://leree4.club/um_corpo_de_massa_m_choca-se_frontalq2px5.pdf
    • https://piwozasemoxusi.weebly.com/uploads/1/3/4/3/134378412/geparimofidurukokog.pdf
    • https://sefewazugep.weebly.com/uploads/1/3/5/2/135293251/rexutaf.pdf
    • http://pink-echo.club/instagram_draft_location_androidlek17.pdf
    • https://cdn.sqhk.co/berirenike/ggiaDwU/natogakebavonusajot.pdf
    • https://xexonuza.weebly.com/uploads/1/3/4/3/134305788/xetijipimipijav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gurupixabogivaz/zavawotosatidafelu.pdf
    • https://s3.amazonaws.com/rovuweraja/supixefabuponavimobe.pdf
    • https://s3.amazonaws.com/zuguvoxoki/99576913428.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011587.bin
de7791cc47ba2c4d3898f3231861a6952cf8f2997612595fa677dc322e6d63a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11587 5384 bytes
font_01_sfnt_off000127f6.bin
6faf1fdc01aebe3d803834b4666d21ad1899be3144447c9124a462e5b3088bf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127F6 12580 bytes

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