Malicious PDF — malware analysis report

Static analysis result for SHA-256 29e1ba1033942371…

MALICIOUS

PDF

70.1 KB Created: 2021-09-09 10:16:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 89c87e16a8f451038216b1ef28bca508 SHA-1: 4398d34278c3962fa92228eec668bf8ad50f1569 SHA-256: 29e1ba103394237163d8cd741edb6102a1aacf934153eb9da0c7b466f9894d1a
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or IP addresses, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://smidgel.ru/uplcv?utm_term=pokemon+sword+free+download+apk PDF link annotation
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/wigoziturenagibulonudegin.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161393d6debf14---91009618863.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/63519321227.pdfIn PDF document text
    • http://indagosrl.it/userfiles/files/67276059519.pdfIn PDF document text
    • http://ed-union05.ru/files/file/dibuzivipapix.pdfIn PDF document text
    • https://mchs.kz/userfiles/File/xexutumupejotowerago.pdfIn PDF document text
    • https://limsurempat.com/contents/files/dipurolugufedijel.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/xubimikubebijabomof.pdfIn PDF document text
    • http://modero.vn/upload/files/demovizirubiparesabaxe.pdfIn PDF document text
    • http://nassagroup.org/app/webroot/js/ckfinder/userfiles/files/dupejosuzo.pdfIn PDF document text
    • http://koreanhotpot.com/uploads/files/4799112512.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/rawutowazewilu.pdfIn PDF document text
    • http://eperon-kochersberg.com/img_db/bekuzitozepasij.pdfIn PDF document text
    • https://dodatkireklamowe.pl/web/uploads/files/dikenuv.pdfIn PDF document text
    • http://tccsrl.org/userfiles/files/54386317389.pdfIn PDF document text
    • https://x-software.cz/data/file/wodoxerifoxinizepujize.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/79301617608.pdfPDF link annotation
    • https://takipbizde.com/calisma2/files/uploads/xedukusubapulim.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/86ockv56fjrkpfkesdpfroggt3/87725605617.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/95023901219.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/benozibeviwebefo.pdfIn PDF document text
    • https://tadimtursu.com/image/files/voluvokewitozuso.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/kowuborenavewili.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16136bba6cd7cc---37417747219.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_off0000b375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB375 15376 bytes
SHA-256: 79c7b7f7add9812fd3ca7b511a68e89b0eba85278d70884093c3aaa5c1e88f4d
font_01_sfnt_off0000da79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA79 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f290.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF290 10648 bytes
SHA-256: 82d4283031f7ac434b32080f2b81927edd3d4bf5f364394abaf076fd43cd4d2d

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