Malicious PDF — malware analysis report

Static analysis result for SHA-256 05de0842c0270c23…

MALICIOUS

PDF

77.7 KB Created: 2021-05-15 01:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 233d57f294afad6b3b3efd708c989a05 SHA-1: a3d1c7199cf85aa18b13df24545ae7f6454dc7e6 SHA-256: 05de0842c0270c230ad05b6a908ea3a04f1607311b98f8a08ccb7c3cc827589a
194 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable domains, suggesting it's part of an SEO spam or phishing campaign. The embedded URLs are likely used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://maypoin.ru/strik?utm_term=plantronics+m50+replacement PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476273/normal_5fe6f46b522fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_5fe992a13aede.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464730/normal_5fd7c11277d12.pdfIn PDF document text
    • http://kimisorunutom.medianewsonline.com/nixirojuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484624/normal_602a2e55496ad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482405/normal_6000fba0e7f6f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xepanagul.rf.gd/bookkeeping_exam_with_answers.pdfIn PDF document text
    • https://d787a32c-196b-4e99-9c98-3ae3c28023f9.filesusr.com/ugd/05b469_65a1a28fc4c44b29b9230dde83433471.pdf?index=trueIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_81b2c6c0fe214db9bfce12d031955b3f.pdf?index=trueIn PDF document text
    • https://856cb5e6-6c81-45ce-9604-b57907a15cd2.filesusr.com/ugd/cc3ca9_04d679fbeef843e4981ea232e572200c.pdf?index=trueIn PDF document text
    • https://43dda2ad-fadc-418c-a2d5-4b96cca2ed60.filesusr.com/ugd/6eca9c_8253f4ebc202457fa6770b571b645ece.pdf?index=trueIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/pulse_width_modulation_basics.pdfIn PDF document text
    • https://da5bec28-7969-4117-8ffb-5069fce5e80c.filesusr.com/ugd/31593d_17fb42b0ea9f46fdae9e7513b2238ed0.pdf?index=trueIn PDF document text
    • https://ef5e9b3f-1a8e-4c79-9b60-34b8f8133c96.filesusr.com/ugd/18574e_c94d7c8893354c16b8591fbe64b799d0.pdf?index=trueIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_fdc1da0caa4d49f5b916d598e034c570.pdf?index=trueIn PDF document text
    • http://zeroxezubanalil.onlinewebshop.net/6th_grade_end_of_year_math_assessment.pdfIn PDF document text
    • http://vefofiben.rf.gd/sketchup_pro_2020_license_cost.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_cba2bc035a63456daa7970785db07743.pdf?index=trueIn PDF document text
    • https://359ea524-acbf-40a7-8d58-ee96a8f10bc8.filesusr.com/ugd/ca2e76_807868addab54ce6a9cf72df56c4efc0.pdf?index=trueIn PDF document text
    • https://e1c07d4e-6587-4767-b76f-5dea9cf3e327.filesusr.com/ugd/51a829_20ee1399ae094244ae56c472f7620e8e.pdf?index=trueIn 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_off0000ccc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCC0 5132 bytes
SHA-256: 88e88bcac43b40d1147f7053882b2c1badd89793b4662cb49da5bdf3a97be11f
font_01_sfnt_off0000de0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0D 11104 bytes
SHA-256: d1b5e6e50bf25338e9f809e9549d7bbae74dae53174532ce671e15dacb7cc2c8
font_02_sfnt_off0001040b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040B 16524 bytes
SHA-256: 189219a9fb7c1b9bc4af3bcf9a0e4bf122ac0cc455284f2625c7701f72dd1dd7
font_03_sfnt_off00011ad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AD0 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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