Malicious PDF — malware analysis report

Static analysis result for SHA-256 151c67920316aa3b…

MALICIOUS

PDF

83.8 KB Created: 2021-03-20 21:24:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 60e37a34be7b1cb0609803ea6f4078dc SHA-1: 587c361f6ca6148a70edd6425f3a411ef871f8cf SHA-256: 151c67920316aa3b101910d1c02e8e0c092ffdf2804160dda679e4e7ad925932
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one specifically pointing to a site related to 'poot apk root android', suggesting a lure for potentially malicious software. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm on disposable hosting, further supporting a malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/wix?keyword=poot+apk+root+android PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4454286/normal_60096a3045d52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369912/normal_6046a8c5e9e62.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472488/normal_6039fb68a80a7.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/jifpogd/diep._io_maze_game_mode.pdfIn PDF document text
    • http://bovibuvebus.getenjoyment.net/alphonso_dunn_workbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419225/normal_602a2d299b998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_6035f12a928ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465548/normal_603e5a0c6eccf.pdfIn PDF document text
    • http://wiinorama.website/38933984666598lq.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/gchjn8y/19707166144.pdfIn PDF document text
    • http://circulshtangcalip.website/wow_classic_dungeon_map_modyxtu4.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/hhhfheE/5408205334.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418972/normal_601d911474387.pdfIn PDF document text
    • http://sehq.xyz/58487140563oejxq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479679/normal_5fffb976df0cb.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/zemisufuzoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464527/normal_5fe882d9db46d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2534f75f-30e5-4ec0-b7cb-c73124b79943/faporof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4141f307-427a-42eb-b88f-eff227819773/nuvixaxejopoban.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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBBD 4808 bytes
SHA-256: e0c6dd5f414468a5d288fd127fbf2555d7259e20b952e5f9a553fb78dd5e5ba6
font_01_sfnt_off0000fc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC20 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000104ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104AE 11068 bytes
SHA-256: bac705b3ab986a65db1e589028c63a6ea511324e50293db2a993b6007c23d94b
font_03_sfnt_off00012aef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEF 16684 bytes
SHA-256: 47d8285f2c2b42433cde3710155f99e20f013e8a034aad4be0db4a65af7326d0

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