Malicious PDF — malware analysis report

Static analysis result for SHA-256 84d02a20fc9eaae2…

MALICIOUS

PDF

79.3 KB Created: 2021-09-12 12:08:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 461c654689699e604feb6e4f1034f501 SHA-1: c4aab3a117ab31c9ff413ce5adfbb749c2ddce4c SHA-256: 84d02a20fc9eaae2c00e22238cb508f2c8d8753c59fed459614afcbb3b368ff6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which are hosted on compromised or disposable domains. The heuristics indicate it functions as a link farm, likely designed to redirect users to phishing sites or download further malicious content. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=how+to+restart+iphone+without+power+button PDF link annotation
    • http://hillcrestneighborhoods.com/userimages/gupigu.pdfIn PDF document text
    • http://tuzoltosagmihald.hu/userfiles/file/8250215318.pdfIn PDF document text
    • http://gu-bo.cn/uploads/files/putizomapabekeji.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cbb3b64586---68154045580.pdfIn PDF document text
    • https://artistaone.co/userfiles/files/tefaroligetubozarawuli.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4a324b094681a7354b567aa7bfedc33d/mibapazemosibisus.pdfIn PDF document text
    • http://prepearl.com/uploadsfile/30939134599.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/25af80cf60852ad118b5d931e579da8d/wowagelozefuwev.pdfIn PDF document text
    • http://dongamold.com/fckeditor/upload_files/file/85096378301.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/88659599662.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/3p07vh8njd6qp7b61iqv3i5ou3/13979779227.pdfIn PDF document text
    • http://tantos.jp/js/upload/files/gubuxi.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/fepimopelij.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/foxepedapijezuwakugeni.pdfIn PDF document text
    • https://groupekheidri.com/ckfinder/userfiles/files/31303260272.pdfIn PDF document text
    • https://zegaoyun.com/calisma2/files/uploads/25281356886.pdfIn PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/zajisexiwaga.pdfIn PDF document text
    • https://eklyps.net/images/file/tipidujaxazevezet.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-7/20210907193733816874.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/fuwob.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/gaxadumek.pdfIn PDF document text
    • http://glavis.biz/userfiles/file/pamofavunokutezexe.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/gunufitasuxalogelalasojo.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/zopazotamorasagokuroliroj.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_off0000d2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A9 10620 bytes
SHA-256: 2d763e40bfd528160088cb4774c61d0dcec9f128d9ab99b4caac742ab896b758
font_01_sfnt_off0000eab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB5 17480 bytes
SHA-256: 2e40632254285fa0b7b8100176f2ffcd7b388ae5da15926d334a086c08e393f2
font_02_sfnt_off000117b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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