Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd6dcfd0cd2be294…

MALICIOUS

PDF

85.8 KB Created: 2021-09-01 15:29:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d500446e288abd90ce9a42163231afbb SHA-1: 435dd6563e7c1f9d90592c9dcc672a5333cfb80f SHA-256: fd6dcfd0cd2be29499b3694747c5f9984128a0d11e883d5cafd2df5c31ed8792
164 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and a large number of external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/42f14a4e68d251118e78390d478c76b5/58653441691.pdf In PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/54336873052.pdfIn PDF document text
    • http://yishiweb.com/upfiles/files/20210901_090619.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/danofenumuxiv.pdfIn PDF document text
    • http://bulongvungtau.com/media/ftp/file/8154588176.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/14989342236.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/78997375389.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/2aec92c299afe72f5eb81742347307b2/ruzamuradulilutar.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/46012514942.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/texevakosisewufujimebus.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/160780c224e70d---gojepadoruzamog.pdfIn PDF document text
    • http://midel.me/userfiles/file/metisaper.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/926c271212a581d2e6ef81ba7ba365e0/64479613261.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/6fbc17a1e6db1bbb1e325970917134ad/59431339981.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/ufejowezigo.pdfIn PDF document text
    • https://mobspace.xyz/web/img/podborky/files/62614500108.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210615032808104.pdfIn PDF document text
    • http://wjcopy.com/upload/files/givulelefumoxarur.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd8af4aecc---wozisosarakepobabosiridap.pdfIn PDF document text
    • http://kleiberit.ru/files/file/jawebelimapujoweziziju.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/21796352845.pdfIn PDF document text
    • http://luckdidea.com/ckfinder/images_store/files/gazojevu.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4cc053c88d97c3a0ef51b58f673f7775/95744914022.pdfIn PDF document text
    • https://kawanmto.info/contents//files/49190450180.pdfIn PDF document text
    • http://cgl.lu/userfiles/files/xuramajivaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=full+hd+hollywood+movies+download+1080p+for+pcPDF 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_off0000e774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE774 18044 bytes
SHA-256: 29a458e1c02fb9cb7481811c319a11e0ef7e64e566f6e216e9a9a565a9e41ae7
font_01_sfnt_off000115ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DE1 11512 bytes
SHA-256: 96dea1146ec660158a25750f4d9f4f0a788087607fa20a4fb83b599ad1f08bc3