Malicious PDF — malware analysis report

Static analysis result for SHA-256 014fdc070c91b35c…

MALICIOUS

PDF

71.4 KB Created: 2021-09-03 16:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7e6682ebe70e579e6ebb23036c0afc87 SHA-1: 6e8bb23a49448e90d3a5047412cd4ef90a9743ba SHA-256: 014fdc070c91b35ce455398ee93719312c134b31e63b930700805f728a9e5e13
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites and disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or SEO manipulation. No scripts were extracted, but the structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • 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 http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bbfcd1a5b---xelulizilagejusar.pdf In PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/28700e40efc93a2d3fb041bb32864aa2/muropejesodovoz.pdfIn PDF document text
    • http://escritacontabilidade.net/fotos/news/file/buperu.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/kepelikiweme.pdfIn PDF document text
    • http://planbmedia.hu/files/futirobutawawi.pdfIn PDF document text
    • http://pengyou-english.com/FileData/ckfinder/files/20210805_40ABA7113A9A0F3C.pdfIn PDF document text
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/d0b3b6aec522edc5f2db02a78c9e464a/tivabisos.pdfIn PDF document text
    • http://tano-cable.com/d/files/gavebaxowoxojixomuso.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/8ada8d6bdbae3f071724369f58331ca5/tujowesapimumipekezobudi.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/65852281630.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/27911347626.pdfIn PDF document text
    • http://z-him.ru/userfiles/file/81238236696.pdfIn PDF document text
    • http://gidromall.ru/img/uploads/file/87286143066.pdfIn PDF document text
    • http://ptichile.cl/userfiles/file/rikibategejepizuse.pdfIn PDF document text
    • http://rfinshaat.az/userfiles/file/73480075161.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/668e19ef330d6d10e3036c4cdda8349f/194276900.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/giladigexavigakixeda.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c29a3ea3d18---80334123108.pdfIn PDF document text
    • http://zerosquareonline.com/file/vazixujorofoxopenidof.pdfIn PDF document text
    • https://astefin.ro/ckfinder/userfiles/files/65187515274.pdfIn PDF document text
    • http://www.samuitns.com/image/upload/File/laworijemefufufivijo.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/60jvrl68hvkd3tlu4dvhkcl0u1/lopaneluzakesavad.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=digital+marketing+strategy+implementation+and+practice+book+pdfPDF link annotation
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB592 15732 bytes
SHA-256: cad60082eb3f3e9c5e864b0e44b2b52728e47a56cdd3abdd3bfaa56af0b044c7
font_01_sfnt_off0000dd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD53 11308 bytes
SHA-256: c34158cae416434be41c2a84ccfd10083b190eb0b7164d41e8f8e347825d5164
font_02_sfnt_off0000f77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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