Malicious PDF — malware analysis report

Static analysis result for SHA-256 1134126b1fc298ab…

MALICIOUS

PDF

74.8 KB Created: 2021-08-29 08:33:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0c95d7ce5ad051473cd361563d262bb8 SHA-1: d80d568fed55d37ca4b7cfe1a62fe5075e464686 SHA-256: 1134126b1fc298abd59ed966ab07c188fdedaeeebcaab9e94d22d40722b94db6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. The document contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves leveraging these links for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://philabc.ru/uplcv?utm_term=90+cents+usd+to+aud PDF link annotation
    • http://mdbim.pl/ubezpiecz/obrazy/file/7963239708.pdfIn PDF document text
    • https://samarpanbharat.org/trila/userfiles/file/filodonukos.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d2f531d8e---baporux.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/98134902124.pdfIn PDF document text
    • http://s8radziejowice-paszkow.pl/userfiles/file/nokopijebu.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/tonepumizukaroja.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/36014508343.pdfIn PDF document text
    • http://okulsanmalatya.com/imgup/file/13114596770.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/fbeunq3l496dicu9utv4gt1ro3/22514019142.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607803f44edc2---tajivakuxofizopuxatekobix.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b445de88b26---4052906302.pdfIn PDF document text
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/nigaroviwobifiludokupewef.pdfIn PDF document text
    • http://artospace.com/pics/file/wozokepo.pdfIn PDF document text
    • https://mattress-leader.com/media/xileratibomegix.pdfIn PDF document text
    • http://poongdung.com/FileData/ckfinder/files/20210704_CD9DDA14691B81BB.pdfIn PDF document text
    • http://rocb-ap.org/file_media/file_image/file/muvamixul.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/f6167ba64bbc42f2acacf2a98938cb75/kulelukodafojigozad.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/virazaxev.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/rivapar.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077503c3e1fe---35019839605.pdfIn PDF document text
    • http://atmaircenter.com/lb/userfiles/files/bovifixuj.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c71b62b2d17---guzafadotikakawameziroti.pdfIn PDF document text
    • http://benetalent.com/upload/files/rakez.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/watojal.pdfIn PDF document text
    • http://aliceinformaticasrl.com/user/pages/foladul.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_off0000c2c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000dada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADA 16744 bytes
SHA-256: bafa211a7ebbe1a796c9ffca52461bef7e6c8fc4a9c0e189c06345dc3e73b70f
font_02_sfnt_off00010626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10626 10416 bytes
SHA-256: 7f04d308e2dcd7766d9b847139d0ff71cde31d4daed5cfe27c7ca9323c252f9c

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