Malicious PDF — malware analysis report

Static analysis result for SHA-256 64ebad068c106279…

MALICIOUS

PDF

79.1 KB Created: 2021-09-01 04:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6abedbaf44d5480c58f2b18b23e035b3 SHA-1: 3f7326888d072bff2afdd7ae5fdf091eafb59d6a SHA-256: 64ebad068c106279082fd56d04a799a4d812fcdbbb23072a46b14ff968a4a32f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV detection for phishing and trojan activity. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm designed to redirect users. The presence of these links and the nature of the heuristics suggest an attempt to direct users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://queure.ru/uplcv?utm_term=indian+food+nutrition+chart+excel PDF link annotation
    • http://acquadiqualita.it/ckfinder/userfiles/files/tuvozuwasamotoduxezixutel.pdfIn PDF document text
    • https://doublehair.center/upload/ckfinder/files/pakiko.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/vasorugabofojo.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/malos.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b620ad6a5fd---winebetivokab.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/27992483404.pdfIn PDF document text
    • http://cngwalk.com/fckeditor/userfiles/image/96607540920.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/pusifaziduletewufineta.pdfIn PDF document text
    • http://dfanchem.com/upload/files/refidinisoxodu.pdfIn PDF document text
    • http://wskinbody.com/data/boardData/files/tadazekifefekagakaf.pdfIn PDF document text
    • http://costruzionibulagna.it/userfiles/files/gupopapimuxezu.pdfIn PDF document text
    • http://buyyoutubelikes.com/ci/userfiles/files/jowusapifubiwi.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/657878bd6d5eb4f4e4fe1a2da9d6cd04/goxevajijivetajej.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/665304884.pdfIn PDF document text
    • https://impeka.lt/components/com_mijoshop/opencart/image/data/files/tanemupodosate.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/petumekajamokotedojas.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098b102c75cb---pedabefubis.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/qn5l9spkr0g9afi2gquu0ip6ep/96153906662.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074b8264148a---52482287014.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a8b9e5a1c---93548243359.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078fcdc209db---getabokozilobenovalosusu.pdfIn PDF document text
    • http://inciboya.com/resimler/site/files/bimalodumawidegunevokupi.pdfIn PDF document text
    • http://liubeauty.com/luutru/files/bonodunopobuwinug.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6ea5be6d86---befedobijekisefozivedate.pdfIn PDF document text
    • https://z87992961.com/upload/files/20210724233743.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_off0000d4af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AF 16004 bytes
SHA-256: 5b03d675899aee7ae1bddc0c69ed86b1a2dcb45421cc02c2f4714f339ec4831c
font_01_sfnt_off0000fd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7F 10556 bytes
SHA-256: 900841f32ee09658e2f294a611c4b1c88e38426bb057a88050c5dfa69cc1ad4c
font_02_sfnt_off00011581.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11581 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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