Malicious PDF — malware analysis report

Static analysis result for SHA-256 48578688071404ed…

MALICIOUS

PDF

150.0 KB Created: 2021-07-02 06:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a5385090595d4f15c92384b5b2a574a8 SHA-1: ce0a7ec3d9fe7f481ec290bffa37386fb66edc4d SHA-256: 48578688071404ed98093c9e97022c38e79c4ae23db0674c1a067d3823690f80
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to compromised CMS uploads and disposable hosting, indicating an attempt to obscure the final malicious destination. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9756

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=great+is+our+lord+god+and+greatly+to+be+praised PDF link annotation
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/6107c0a5907456322d7fb93f0d0a0749/50667613843.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c8fdbb183b---kizag.pdfIn PDF document text
    • http://alliusie.com/userfiles/file/15458589772.pdfIn PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/58a1ec922bd941c2bd3ca7b9dd0b6aeb/87562591587.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/warajiwew.pdfIn PDF document text
    • http://envigest.cz/upload/file/pagepogapizuninimufuk.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/45526733620.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/90391838461.pdfIn PDF document text
    • http://mackyz7automotive.com/js/upload/files/vubapojolozedu.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85da8336f0---fasadeto.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b74cd15e9c4---tebab.pdfIn PDF document text
    • http://chelseacarpet.com/ckfinder/userfiles/uploads/59702489754.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/40808374528.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/nupalodomejun.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/jk8fl4lqjit5cmp0d64606j2v6/93569859500.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/67a3cdff89bbfcd9909220f33ecd3a10/57381607963.pdfIn PDF document text
    • http://ndt-tl.ru/upload/file/88323668860.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b99ef57350---19442454948.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bacde87ce---17934970140.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/jowilezolum.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/72648250419.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4150a286b0---wiwetibuk.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/dubanesukem.pdfIn PDF document text
    • http://chupanhnoithat.vn/upload/files/73998587223.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C407 10960 bytes
SHA-256: 5abbb50c02b8ee52670be7bd3004e35ec5d8a87a1dce37888de21b1cfd8f4083
font_01_sfnt_off0001dd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DD29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001f53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F53B 20640 bytes
SHA-256: 7691bc1bf0f71e93c0c5bfac42b266d00cbca82758a64aa537e0f5ad8fe5370e
font_03_sfnt_off00022849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22849 19408 bytes
SHA-256: 0a4e5ce7b56e49f9adcc1a146bf9d1d5600c183fa0c46d54c6c04fa373ca3136

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