Malicious PDF — malware analysis report

Static analysis result for SHA-256 e76cb210de605108…

MALICIOUS

PDF

73.1 KB Created: 2021-09-17 11:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 44667f6a9a34a824d93e0b7b2072e930 SHA-1: 1b09a58de0636ed194c3090c3457d017a739afff SHA-256: e76cb210de6051081ce0403d2bf26eb0517f1a414a1b6e656c04c2a591a67b7c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URLs, including one with a 'td canada trust android apk download' UTM term, suggests a phishing or credential harvesting attempt. The PDF structure and embedded links point towards a malicious document designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • 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.
  • 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://pistant.ru/uplcv?utm_term=td+canada+trust+android+apk+download PDF link annotation
    • http://jinyezi.cn/upload/rotutamixowefabuzen.pdfIn PDF document text
    • https://ww150006.linebot.net/upfile/files/20210914114508.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/161421d1fb9912---36692512077.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16133b5a480bf0---61601514996.pdfIn PDF document text
    • http://gorsilawfirm.com/userfiles/file/17993605766.pdfIn PDF document text
    • http://nct-vn.com/userfiles/file/sinunanejakalirire.pdfIn PDF document text
    • http://fedime.org/imagenes/wuwisutakixaru.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/rorakebarunubovumova.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/userfiles/fichiers/87381927117.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/84185943129.pdfIn PDF document text
    • https://avenue102.com/uploads/file/91343584334.pdfIn PDF document text
    • http://doudou.tw/userfiles/files/48001247233.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/3670362296.pdfIn PDF document text
    • http://mprime.net/ckfinder/userfiles/files/5444077780.pdfIn PDF document text
    • https://kar360.com/resimler/files/novunom.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/busepit.pdfIn PDF document text
    • https://moulindelarroque.com/userfiles/file/luvukekarirodefujaf.pdfIn PDF document text
    • http://dongtienlamnghiep.com/upload/file/10169765600.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/75494407573.pdfIn PDF document text
    • http://dejede.com/userfiles/file/tubuwotavusilugina.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/65346794625.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/33559758415.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/fexebunogagabavile.pdfIn PDF document text
    • http://beta-rc.com/upload/files/ravaduk.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/zaledalukepa.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_off0000bb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB58 10616 bytes
SHA-256: 4ae54047c03782b299a912513944c712b250a340aa63a25a0ae447816d933f7c
font_01_sfnt_off0000d3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3CC 16688 bytes
SHA-256: 060d6bb7245392ba36101de4a7f3e196d06337f587a17de61b348ee2a3f2cd8b
font_02_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1