Malicious PDF — malware analysis report

Static analysis result for SHA-256 d174b2685f995e05…

MALICIOUS

PDF

68.7 KB Created: 2021-09-25 13:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 79189ab33f50f8fc8ad9243b296b6785 SHA-1: b02a4f5bdde9db6994f181bcbaac3aaa396880c2 SHA-256: d174b2685f995e05295bbc907ab78f520ea46400cf2c98b58da43bc2d11d44ca
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a large number of external URIs, many of which point to disposable hosting, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • 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://oniceh.ru/uplcv?utm_term=hack+soccer+hero PDF link annotation
    • http://masan315.net/board/imagefile/file/pewutunegan.pdfIn PDF document text
    • http://gensugroup.com/upload/files/58853712114.pdfIn PDF document text
    • https://glearningsolutions.com/userfiles/files/modubibuf.pdfIn PDF document text
    • https://primer-spb.ru/files/files/xajon.pdfIn PDF document text
    • https://fedico.ca/upload/editor/file/wodikirunifadivo.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/lezuwimemamezusa.pdfIn PDF document text
    • https://terlickodds.cz/www/www/fckphotos/file/77234617570.pdfIn PDF document text
    • http://milkyway-vn.com/upload/files/65719087188.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210918010646.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/binesabukumalajelevuso.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/75914578765.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/saxatavujakefukivaxoj.pdfIn PDF document text
    • https://sofupingame.com/calisma2/files/uploads/14852778905.pdfIn PDF document text
    • http://hnfhdc.com/UpLoadFile/2021091021023544200.pdfIn PDF document text
    • http://hyundai-dongdo.vn/images/files/zuwubudeguragimig.pdfIn PDF document text
    • https://seltec.io/images/uploads/files/65196154500.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/jajugunegebabufoko.pdfIn PDF document text
    • http://freeski.hu/freeski/file/89136836149.pdfIn PDF document text
    • http://rotang.net/userfiles/file/tujexuxibe.pdfIn PDF document text
    • http://ikra-ekb.ru/files/fckeditor/file/zozisiveketiluforat.pdfIn PDF document text
    • https://saleskerala.com/ckfinder/userfiles/files/xenevuvupemoxini.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613e335536e00---94643290200.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_off0000b000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB000 15296 bytes
SHA-256: f6edc438488a9cbf7cfcd032032e6f2c1f1835c0f0a4620b0618e58a1142406d
font_01_sfnt_off0000d6d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6D1 10068 bytes
SHA-256: 0bcedef6db7a925cae624ea0082a39403e992ee13e3fab79b22e3ef9d27473b5
font_02_sfnt_off0000ed62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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