Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7b6410f7c6ac751…

MALICIOUS

PDF

79.0 KB Created: 2021-03-20 10:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: f241f553dd5dc2eec86d1f4152839d2b SHA-1: 06223b592d472b47c410ab63fe8cc793d088b692 SHA-256: d7b6410f7c6ac7514842a7a80ee9a61f2ec0d7417441f51c4cfe3206345be89f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • 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://jumiwimov.ru/award?keyword=alternative+assessment+definition+pdf PDF link annotation
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/2330225.pdfIn PDF document text
    • https://cdn.sqhk.co/motuwezelu/ITigihs/80344195587.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457561/normal_5fe33a717553f.pdfIn PDF document text
    • http://beststudent.space/94301973574l7a1p.pdfIn PDF document text
    • https://cdn.sqhk.co/xomatujod/ji9iagh/14061083467.pdfIn PDF document text
    • http://idealicacolumbia.site/bigo_live_diamond_mod_apkgeu0x.pdfIn PDF document text
    • https://gikunagab.weebly.com/uploads/1/3/0/7/130738902/69759.pdfIn PDF document text
    • https://mubuxepuvu.weebly.com/uploads/1/3/1/3/131383429/1e39d300a.pdfIn PDF document text
    • http://classkaod.ru/manual_pactware_4.1tf5kr.pdfIn PDF document text
    • http://glawerry.online/42718412067whgxo.pdfIn PDF document text
    • https://dexuganepo.weebly.com/uploads/1/3/1/6/131608037/bafaniviwosodajuxal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_60328e4f321d2.pdfIn PDF document text
    • https://remoruputudedux.weebly.com/uploads/1/3/4/0/134017090/1354769.pdfIn PDF document text
    • http://usejus.pro/979161534330rl55.pdfIn PDF document text
    • http://itfamily.info/restaurar_os_contadores_shortcut_manznywz.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/2680698.pdfIn PDF document text
    • https://putidano.weebly.com/uploads/1/3/4/3/134388569/7871996.pdfIn PDF document text
    • http://azules.ru/zugivekikegilelukunost0zh.pdfIn PDF document text
    • https://cdn.sqhk.co/sasibasodiwu/hjfQVzv/18542154790.pdfIn PDF document text
    • https://wufowidujexo.weebly.com/uploads/1/3/5/2/135293423/gajawelaligi.pdfIn PDF document text
    • http://wowitaly.space/dasivijisojowosqvuif.pdfIn PDF document text
    • https://wosaboler.weebly.com/uploads/1/3/4/4/134496590/4265557.pdfIn PDF document text
    • https://gikemozepuv.weebly.com/uploads/1/3/0/7/130740444/0e098a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490265/normal_6055a730a9798.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 5236 bytes
SHA-256: e5c0e07c413f3e9440dc36ce8cc0e412516256e5da2f3e42f60d3fdc86e7334a
font_01_sfnt_off000109f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F5 10768 bytes
SHA-256: ff86fad647153237b35c40b531e9cd31c69cc4516cde013d72404b4579ac99cd