Malicious PDF — malware analysis report

Static analysis result for SHA-256 e379a84fd43b8820…

MALICIOUS

PDF

70.9 KB Created: 2021-09-01 12:14:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 30058746aa2ab85d353765d7d5f7fee3 SHA-1: 1b8cc4a25cbd27c506b355fb451327e5e2798f91 SHA-256: e379a84fd43b882056d1281f68bb55c45bdfbfea5b6f9472a5256e6e01abebe9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, directing users to numerous external websites hosted on potentially compromised or disposable domains. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM firings indicates a pattern of using such documents to distribute links, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://allytemp.ru/uplcv?utm_term=three+month+old+bearded+dragon PDF link annotation
    • http://rgn2u.com/userfiles/files/73365127012.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/4425f885ce52227d8b658dc39c8dde0e/xisimeli.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/37622054148.pdfIn PDF document text
    • http://hrt-foto.hu/_user/file/57523823468.pdfIn PDF document text
    • http://xinghui.co/upload/ckimg/files/202108030221363345.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef57a41956---61671603119.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/d2f3b440563a7c1e6855a146a7a7704c/fokugagajatuz.pdfIn PDF document text
    • http://baocaosuhoatoc.com/luutru/files/nimamibukofu.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/naroxutamodopatigo.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/7a5cf88d363434397fde50b14cd72cef/49781367914.pdfIn PDF document text
    • https://binarbaidservices.com/public_html/userfiles/file/junotunimuwegoluzubapa.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/9e8c69164cdb8be9e94b13b84072ba7b/gavizaxibutafa.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c6da53eefd8---31990432142.pdfIn PDF document text
    • http://climtech.com/files/files/72594164787.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/76a6f196f95d71626aa600c4efcd5715/42214862985.pdfIn PDF document text
    • https://wendi101.com/userfiles/file/26972415768.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072b7ddd13b3---16025622905.pdfIn PDF document text
    • http://salondebellezaanamariaromero.es//ckfinder/userfiles/files/farokotejipogimajezibali.pdfIn PDF document text
    • http://cristalensi.com/public/File/55869840621.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611731f6da64f---luziturevub.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b95896f0860---60987555062.pdfIn PDF document text
    • https://adci.vn/data/upload/file/zogejexufa.pdfIn PDF document text
    • https://rpitrade.com/ckfinder/userfiles/files/54938550157.pdfIn PDF document text
    • http://ducthoaudio.com/upload/files/puvep.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b8b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 15040 bytes
SHA-256: 3692482c99bd9d3082eed5eb58d7ba28cc56c93bba1b1c3d1b7a88ac56fd5010
font_02_sfnt_off0000f671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF671 10536 bytes
SHA-256: 81fa84f69ebfca88680d5c20aeec4af94f86af3bbe7c426542dbf5fe7b8c7aec

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