Malicious PDF — malware analysis report

Static analysis result for SHA-256 f02630d9f05ae59c…

MALICIOUS

PDF

81.2 KB Created: 2021-09-13 06:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d72497d9acf51f3f1303d64650b959f6 SHA-1: 2f0b6c28b5320c0bec23d3f608fb7fdff102b3a1 SHA-256: f02630d9f05ae59c452d5af2eddfed6b05f64bc3f24613ab0397a0c68b17a4fb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, a common technique for executing malicious code within PDFs. It also features numerous URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/161378e87098c6---pazabimita.pdf In PDF document text
    • https://at1-turbo-j3t.com/contents/files/pofofinaduvaruzukazuner.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/trbbf1kjes2q7p71ljshde0ton/vikefabuxe.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/16138a7895c5c8---6446412055.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/xifijojo.pdfIn PDF document text
    • http://w3-japan.com/js/upload/files/64708034999.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/7371493034.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109131109078665.pdfIn PDF document text
    • https://conexus-study-abroad-travel.com/ckfinder/userfiles/file/80076360684.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/25801937252.pdfIn PDF document text
    • https://seas2010.cienciaevida.pt/site/upload/file/27206874100.pdfIn PDF document text
    • http://nakakinpump.kr/fckeditor/upload/file/fovumituxagolirabamud.pdfIn PDF document text
    • https://atrax.hr/files/defifipojuvarujo.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202109020053076315.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/8366767766.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/kabiwatogaduweboj.pdfIn PDF document text
    • https://mbbs.hr/files/lalavizodawefuwoke.pdfIn PDF document text
    • https://stillwaiting.org/userfiles/file/91135075145.pdfIn PDF document text
    • http://xn--80aa5alfu.kz/file/ginofuxubaguwelez.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/wuluvaporifun.pdfIn PDF document text
    • http://proleague.dk/userfiles/file/15528697717.pdfIn PDF document text
    • https://hocaukhudothithanhphogiaoluu.com/asset/site/files/45028716944.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=ragnarok+generation+x+apkPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d65e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65E 18708 bytes
SHA-256: c0b4202f90747ef04de0dbd8f7c8e054fd219e6448418dec83b9a8e97c220e0d
font_01_sfnt_off000107a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FB9 10452 bytes
SHA-256: 4f6adc0e2d895fece355c8f7c7a604b3f4960cd2efb2567f0f965971dfb6fb46