Malicious PDF — malware analysis report

Static analysis result for SHA-256 eabc93e375996df1…

MALICIOUS

PDF

78.1 KB Created: 2021-09-18 19:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: b2d38842a47fce08d03ebd0296c1dfdc SHA-1: 54aa21bda59380851f569134b95ab57f4c77cc48 SHA-256: eabc93e375996df1fdd35c9dbcdcf7db7195be2fc24af95b2b4179c5e7ea4cce
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs pointing to various domains, many of which are associated with compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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=game+stickman+legacy PDF link annotation
    • https://virker-ikke.dk/files/mabenipitinizagutigi.pdfIn PDF document text
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1612f399261599---72479540328.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/27133566629.pdfPDF link annotation
    • https://locktactyuma.com/ckfinder/userfiles/files/55952770534.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f5391d28ba---12890089322.pdfIn PDF document text
    • https://elpollopaulino.com/cenavarra_userfiles/files/79133943231.pdfIn PDF document text
    • https://korankertas.com/contents/files/53894557697.pdfIn PDF document text
    • http://snnet.kr/board_pds/fckeditor/2021/09/file/vuwedodokekutanunej.pdfIn PDF document text
    • http://thunderstar.cn/userfiles/file/20210914143326805051373.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1613ddb23a9dea---66498558963.pdfIn PDF document text
    • https://anakmeong.com/contents/files/6785524204.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/b1d50c19d9e453791275cd4741e22bf3/kimitatexapozulotudezugi.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/bugabexividiwaguruni.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/62267248269.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/deduvategekonatesokipelu.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/gadiw.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/19273437353.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/jetabajowulegefeseneji.pdfIn PDF document text
    • http://damutech.kz/upload/2021/09files/210901111614038047cesc0.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/parofuguxa.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/161362fdd79678---pukiwijifosenezuri.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/86064827089.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/33364326718.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/ximozisesax.pdfIn PDF document text
    • http://adurucui.com/ckfinder/files/63992081908.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_off0000d024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD024 16412 bytes
SHA-256: 527dbcc9ab6d0698717a3b8f48e15892055f3d20e9e08c000e23fd4dfb3b70cc
font_01_sfnt_off0000fa77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA77 10596 bytes
SHA-256: 82a14aecfcc3c22bc2355317de7ca86686263622effadf403cd89d4ada4c0456
font_02_sfnt_off000112b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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