Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d87c19af3f15913…

MALICIOUS

PDF

96.4 KB Created: 2021-08-05 18:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: b26b188da91071bca35c97b29b6f6bef SHA-1: 547cebf356b2dba79b823e00e0e47b039fe69b71 SHA-256: 2d87c19af3f159137c228621e5aa65c909c925eaf22b6efb699e0d65bf74e10a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for initiating the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d21b5cfe41---33293601486.pdf In PDF document text
    • https://nangluongvada.com/uploads/files/69927473208.pdfIn PDF document text
    • http://healingtown.org/userData/board/file/76604950606.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/wowoku.pdfIn PDF document text
    • http://nadiadsa.org/userfiles/file/46541509036.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/af7deca3e0491e9b93e1ba4bb268d1d5/52108566296.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609215fae9c69---gititerekotemapeworazuvaw.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/sgb6g12fch2td9skb9v6n9t6uo/lagasupelabowi.pdfIn PDF document text
    • https://triosms.com/userfiles/file/7595911162.pdfIn PDF document text
    • http://effekt-film.de/files/file/11819639735.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/ebrtuftl4kqb8jh5sf2qiosln2/sunatipukutararulufobala.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608c01704a806---14424511645.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/sr2hrv15ck48b2599foa91cc1c/ladadidi.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608bf6fb77c81---27110897997.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07aeaa5597---97833235843.pdfIn PDF document text
    • https://diaspoassur.com/wp-content/plugins/super-forms/uploads/php/files/ce4177e69b52359a75334a6a4e0e5b16/faxudarutevuwivab.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/hncgf8or3oq64eqpk84s1t42uk/nutukonuvewixokitot.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/87uh28dcs33405fjf9om58jnfi/dexumonebajegelu.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/a6pr7v8be9gbkpj52pr9n9471a/44617031033.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/q9iano2l6d90eqfrkn8iea91d7/pividudejuzojidu.pdfIn PDF document text
    • http://hengtongrongshang.com/jingkelun/userfiles/files/20210731120114.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8eccb82cc7---wafavadasaxexunufak.pdfIn PDF document text
    • https://itandem.net/ckfinder/userfiles/files/gewezojemu.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/wivejajajazisefudozabisux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=do+emp+jammers+workPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001060c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E19 1692 bytes
SHA-256: 6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
font_02_sfnt_off0001261d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261D 20704 bytes
SHA-256: 6dba5ee8d3121d842626f41a21193a62b9a9dffbe4212fa15481651db02f3fa2
font_03_sfnt_off00015ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AD8 10380 bytes
SHA-256: dbc09c2938d8c5d7352b7b7e7ae537a1d2489bd3a4da8f12050ed1357f44ad5a

Open this report in the interactive analyzer, or submit your own file for analysis.