Malicious PDF — malware analysis report

Static analysis result for SHA-256 1980f1ccabe3f046…

MALICIOUS

PDF

79.0 KB Created: 2021-09-16 04:05:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fd0ad3323eb2c817b8341231045b7c76 SHA-1: 90bb4f4224873f8d18da415048da6529f6923cd5 SHA-256: 1980f1ccabe3f046980eb17bf16697eccd6d263524dcf3ada79c9edcab7de237
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, including one pointing to a raw IP address, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support this assessment. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • 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://cructi.ru/uplcv?utm_term=for+a+while+synonym PDF link annotation
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d16252a80d880ffdc53387500d2631d/72338442591.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/41788174387.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/85762052582.pdfIn PDF document text
    • https://liho.cz/UserFiles/File/dolajegotu.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021091403575824.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/fotubuvabexuvopapipudavum.pdfIn PDF document text
    • http://www.puhito.hu/uploads/fovubuwiw.pdfIn PDF document text
    • https://szallas-karpatalja.hu/upload/19521534137.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/lomamewiravojolexadelazot.pdfIn PDF document text
    • http://zhuoxinlaw.com/userfiles/file/20210914192529_1195259678.pdfIn PDF document text
    • http://bursaceyizgelinlik.com/images_upload/files/vuzegorilulezijaxiwugasoz.pdfIn PDF document text
    • https://lecormier-menuiserie.com/www/upload/files/jelolebezajutanupusoxom.pdfIn PDF document text
    • https://sentralperdana.com/file/26055641416.pdfIn PDF document text
    • http://gesundezellen.com/neu/userfiles/file/popuwukusafixokufajono.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/18447560706.pdfIn PDF document text
    • http://strandedtattoo.net/file/9094395300.pdfIn PDF document text
    • http://gearcon-eng.com/file_media/file_image/file/46780432904.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/16140ea45b5ce3---61285665369.pdfPDF link annotation
    • http://bsp-oblspl.org/ckfinder/userfiles/files/87290538128.pdfIn PDF document text
    • http://hanyangsteel.com/files/fckeditor/file/18769993446131783b778eb.pdfIn PDF document text
    • http://vit-physio.de/file/kofuni.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc1dcd0e49---89178968501.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_off0000d195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD195 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 10452 bytes
SHA-256: 974a74cd085b53459928f900dfa11b08f636c12e0472de05df885eb197fad056
font_02_sfnt_off0001012f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012F 17600 bytes
SHA-256: 1fe869b6236a77ced97ec0ee7daf9a8648ae67ad46d2b82b2b8156629ddfbafd